diff --git a/lock.json b/lock.json
index f545daad..3f65e44f 100644
--- a/lock.json
+++ b/lock.json
@@ -1,5 +1,5 @@
 {
-    "memo": "47c0ec3d677d1d5c01778bc81836801e009c641797708b8fcd773dce954c7714",
+    "memo": "56093ed07896d0d5c47ee3472d6ad16e9a7e6826598364caf01ac30dc9c277c5",
     "projects": [
         {
             "name": "github.com/Masterminds/semver",
@@ -35,16 +35,8 @@
         },
         {
             "name": "github.com/sdboyer/gps",
-            "version": "v0.13.1",
-            "revision": "e4435f58dfa1aee0c5324667f5b6cbad668db8fc",
-            "packages": [
-                "."
-            ]
-        },
-        {
-            "name": "github.com/termie/go-shutil",
             "branch": "master",
-            "revision": "bcacb06fecaeec8dc42af03c87c6949f4a05c74c",
+            "revision": "b27173f3bf78a69a70dba35122ce24eb1679a53a",
             "packages": [
                 "."
             ]
diff --git a/manifest.json b/manifest.json
index 46bb54c9..3ba303e8 100644
--- a/manifest.json
+++ b/manifest.json
@@ -4,13 +4,13 @@
             "branch": "2.x"
         },
         "github.com/Masterminds/vcs": {
-            "version": ">=1.8.0, <2.0.0"
+            "version": "^1.8.0"
         },
         "github.com/pkg/errors": {
             "version": ">=0.8.0, <1.0.0"
         },
         "github.com/sdboyer/gps": {
-            "version": ">=0.13.0, <1.0.0"
+            "branch": "master"
         }
     }
 }
diff --git a/vendor/github.com/sdboyer/gps/README.md b/vendor/github.com/sdboyer/gps/README.md
index 4c7c3c45..b7735ef9 100644
--- a/vendor/github.com/sdboyer/gps/README.md
+++ b/vendor/github.com/sdboyer/gps/README.md
@@ -101,8 +101,8 @@ general library could know _a priori_.
 * What dependency version constraints are declared by [all dependencies](https://github.com/sdboyer/gps/wiki/gps-for-Implementors#the-projectanalyzer)
 * Given a [previous solution](https://github.com/sdboyer/gps/wiki/gps-for-Implementors#lock-data), [which versions to let change, and how](https://github.com/sdboyer/gps/wiki/gps-for-Implementors#tochange-changeall-and-downgrade)
   * In the absence of a previous solution, whether or not to use [preferred versions](https://github.com/sdboyer/gps/wiki/gps-for-Implementors#preferred-versions)
-* Allowing, or not, the user to [swap in different network names](https://github.com/sdboyer/gps/wiki/gps-for-Implementors#projectidentifier) for import paths (e.g. forks)
-* Specifying additional input/source packages not reachable from the root import graph ([not complete](https://github.com/sdboyer/gps/issues/42))
+* Allowing, or not, the user to [swap in different source locations](https://github.com/sdboyer/gps/wiki/gps-for-Implementors#projectidentifier) for import paths (e.g. forks)
+* Specifying additional input/source packages not reachable from the root import graph
 
 This list may not be exhaustive - see the
 [implementor's guide](https://github.com/sdboyer/gps/wiki/gps-for-Implementors)
diff --git a/vendor/github.com/sdboyer/gps/bridge.go b/vendor/github.com/sdboyer/gps/bridge.go
index ba304ccd..5d8c4c6a 100644
--- a/vendor/github.com/sdboyer/gps/bridge.go
+++ b/vendor/github.com/sdboyer/gps/bridge.go
@@ -361,10 +361,10 @@ func (b *bridge) SyncSourceFor(id ProjectIdentifier) error {
 // operations attempt each member, and will take the most open/optimistic
 // answer.
 //
-// This technically does allow tags to match branches - something we
-// otherwise try hard to avoid - but because the original input constraint never
-// actually changes (and is never written out in the Result), there's no harmful
-// case of a user suddenly riding a branch when they expected a fixed tag.
+// This technically does allow tags to match branches - something we otherwise
+// try hard to avoid - but because the original input constraint never actually
+// changes (and is never written out in the Solution), there's no harmful case
+// of a user suddenly riding a branch when they expected a fixed tag.
 type versionTypeUnion []Version
 
 // This should generally not be called, but is required for the interface. If it
diff --git a/vendor/github.com/sdboyer/gps/constraints.go b/vendor/github.com/sdboyer/gps/constraints.go
index 7eaad998..53dc6086 100644
--- a/vendor/github.com/sdboyer/gps/constraints.go
+++ b/vendor/github.com/sdboyer/gps/constraints.go
@@ -198,8 +198,8 @@ func pcSliceToMap(l []ProjectConstraint, r ...[]ProjectConstraint) ProjectConstr
 
 	for _, pc := range l {
 		final[pc.Ident.ProjectRoot] = ProjectProperties{
-			NetworkName: pc.Ident.NetworkName,
-			Constraint:  pc.Constraint,
+			Source:     pc.Ident.Source,
+			Constraint: pc.Constraint,
 		}
 	}
 
@@ -213,8 +213,8 @@ func pcSliceToMap(l []ProjectConstraint, r ...[]ProjectConstraint) ProjectConstr
 				final[pc.Ident.ProjectRoot] = pp
 			} else {
 				final[pc.Ident.ProjectRoot] = ProjectProperties{
-					NetworkName: pc.Ident.NetworkName,
-					Constraint:  pc.Constraint,
+					Source:     pc.Ident.Source,
+					Constraint: pc.Constraint,
 				}
 			}
 		}
@@ -231,7 +231,7 @@ func (m ProjectConstraints) asSortedSlice() []ProjectConstraint {
 		pcs[k] = ProjectConstraint{
 			Ident: ProjectIdentifier{
 				ProjectRoot: pr,
-				NetworkName: pp.NetworkName,
+				Source:      pp.Source,
 			},
 			Constraint: pp.Constraint,
 		}
@@ -262,8 +262,8 @@ func (m ProjectConstraints) merge(other ...ProjectConstraints) (out ProjectConst
 		for pr, pp := range pcm {
 			if rpp, exists := out[pr]; exists {
 				pp.Constraint = pp.Constraint.Intersect(rpp.Constraint)
-				if pp.NetworkName == "" {
-					pp.NetworkName = rpp.NetworkName
+				if pp.Source == "" {
+					pp.Source = rpp.Source
 				}
 			}
 			out[pr] = pp
@@ -297,7 +297,7 @@ func (m ProjectConstraints) override(pr ProjectRoot, pp ProjectProperties) worki
 	wc := workingConstraint{
 		Ident: ProjectIdentifier{
 			ProjectRoot: pr,
-			NetworkName: pp.NetworkName,
+			Source:      pp.Source,
 		},
 		Constraint: pp.Constraint,
 	}
@@ -319,8 +319,8 @@ func (m ProjectConstraints) override(pr ProjectRoot, pp ProjectProperties) worki
 		// from. Such disagreement is exactly what overrides preclude, so
 		// there's no need to preserve the meaning of "" here - thus, we can
 		// treat it as a zero value and ignore it, rather than applying it.
-		if opp.NetworkName != "" {
-			wc.Ident.NetworkName = opp.NetworkName
+		if opp.Source != "" {
+			wc.Ident.Source = opp.Source
 			wc.overrNet = true
 		}
 	}
diff --git a/vendor/github.com/sdboyer/gps/hash.go b/vendor/github.com/sdboyer/gps/hash.go
index bb5fa420..c8bd4642 100644
--- a/vendor/github.com/sdboyer/gps/hash.go
+++ b/vendor/github.com/sdboyer/gps/hash.go
@@ -26,7 +26,7 @@ func (s *solver) HashInputs() []byte {
 	buf := new(bytes.Buffer)
 	for _, pd := range p {
 		buf.WriteString(string(pd.Ident.ProjectRoot))
-		buf.WriteString(pd.Ident.NetworkName)
+		buf.WriteString(pd.Ident.Source)
 		// FIXME Constraint.String() is a surjective-only transformation - tags
 		// and branches with the same name are written out as the same string.
 		// This could, albeit rarely, result in input collisions when a real
@@ -50,10 +50,14 @@ func (s *solver) HashInputs() []byte {
 			buf.WriteString(perr.P.CommentPath)
 			buf.WriteString(perr.P.ImportPath)
 			for _, imp := range perr.P.Imports {
-				buf.WriteString(imp)
+				if !isStdLib(imp) {
+					buf.WriteString(imp)
+				}
 			}
 			for _, imp := range perr.P.TestImports {
-				buf.WriteString(imp)
+				if !isStdLib(imp) {
+					buf.WriteString(imp)
+				}
 			}
 		}
 	}
@@ -88,8 +92,8 @@ func (s *solver) HashInputs() []byte {
 
 	for _, pc := range s.ovr.asSortedSlice() {
 		buf.WriteString(string(pc.Ident.ProjectRoot))
-		if pc.Ident.NetworkName != "" {
-			buf.WriteString(pc.Ident.NetworkName)
+		if pc.Ident.Source != "" {
+			buf.WriteString(pc.Ident.Source)
 		}
 		if pc.Constraint != nil {
 			buf.WriteString(pc.Constraint.String())
diff --git a/vendor/github.com/sdboyer/gps/hash_test.go b/vendor/github.com/sdboyer/gps/hash_test.go
index b2df5579..2aa8fb9d 100644
--- a/vendor/github.com/sdboyer/gps/hash_test.go
+++ b/vendor/github.com/sdboyer/gps/hash_test.go
@@ -182,7 +182,7 @@ func TestHashInputsOverrides(t *testing.T) {
 	// First case - override something not in the root, just with network name
 	rm.ovr = map[ProjectRoot]ProjectProperties{
 		"c": ProjectProperties{
-			NetworkName: "car",
+			Source: "car",
 		},
 	}
 	params := SolveParameters{
@@ -259,8 +259,8 @@ func TestHashInputsOverrides(t *testing.T) {
 
 	// Override not in root, both constraint and network name
 	rm.ovr["e"] = ProjectProperties{
-		NetworkName: "groucho",
-		Constraint:  NewBranch("plexiglass"),
+		Source:     "groucho",
+		Constraint: NewBranch("plexiglass"),
 	}
 	dig = s.HashInputs()
 	h = sha256.New()
@@ -334,7 +334,7 @@ func TestHashInputsOverrides(t *testing.T) {
 
 	// Override in root, only network name
 	rm.ovr["a"] = ProjectProperties{
-		NetworkName: "nota",
+		Source: "nota",
 	}
 	dig = s.HashInputs()
 	h = sha256.New()
@@ -373,8 +373,8 @@ func TestHashInputsOverrides(t *testing.T) {
 
 	// Override in root, network name and constraint
 	rm.ovr["a"] = ProjectProperties{
-		NetworkName: "nota",
-		Constraint:  NewVersion("fluglehorn"),
+		Source:     "nota",
+		Constraint: NewVersion("fluglehorn"),
 	}
 	dig = s.HashInputs()
 	h = sha256.New()
diff --git a/vendor/github.com/sdboyer/gps/lock.go b/vendor/github.com/sdboyer/gps/lock.go
index fea53196..a349761c 100644
--- a/vendor/github.com/sdboyer/gps/lock.go
+++ b/vendor/github.com/sdboyer/gps/lock.go
@@ -1,6 +1,9 @@
 package gps
 
-import "sort"
+import (
+	"bytes"
+	"sort"
+)
 
 // Lock represents data from a lock file (or however the implementing tool
 // chooses to store it) at a particular version that is relevant to the
@@ -20,6 +23,43 @@ type Lock interface {
 	Projects() []LockedProject
 }
 
+// LocksAreEq checks if two locks are equivalent. This checks that
+// all contained LockedProjects are equal, and optionally (if the third
+// parameter is true) whether the locks' input hashes are equal.
+func LocksAreEq(l1, l2 Lock, checkHash bool) bool {
+	// Cheapest ops first
+	if checkHash && !bytes.Equal(l1.InputHash(), l2.InputHash()) {
+		return false
+	}
+
+	p1, p2 := l1.Projects(), l2.Projects()
+	if len(p1) != len(p2) {
+		return false
+	}
+
+	// Check if the slices are sorted already. If they are, we can compare
+	// without copying. Otherwise, we have to copy to avoid altering the
+	// original input.
+	sp1, sp2 := lpsorter(p1), lpsorter(p2)
+	if len(p1) > 1 && !sort.IsSorted(sp1) {
+		p1 = make([]LockedProject, len(p1))
+		copy(p1, l1.Projects())
+		sort.Sort(lpsorter(p1))
+	}
+	if len(p2) > 1 && !sort.IsSorted(sp2) {
+		p2 = make([]LockedProject, len(p2))
+		copy(p2, l2.Projects())
+		sort.Sort(lpsorter(p2))
+	}
+
+	for k, lp := range p1 {
+		if !lp.Eq(p2[k]) {
+			return false
+		}
+	}
+	return true
+}
+
 // LockedProject is a single project entry from a lock file. It expresses the
 // project's name, one or both of version and underlying revision, the network
 // URI for accessing it, the path at which it should be placed within a vendor
@@ -107,6 +147,33 @@ func (lp LockedProject) Version() Version {
 	return lp.v.Is(lp.r)
 }
 
+// Eq checks if two LockedProject instances are equal.
+func (lp LockedProject) Eq(lp2 LockedProject) bool {
+	if lp.pi != lp2.pi {
+		return false
+	}
+
+	if lp.r != lp2.r {
+		return false
+	}
+
+	if len(lp.pkgs) != len(lp2.pkgs) {
+		return false
+	}
+
+	for k, v := range lp.pkgs {
+		if lp2.pkgs[k] != v {
+			return false
+		}
+	}
+
+	if !lp.v.Matches(lp2.v) {
+		return false
+	}
+
+	return true
+}
+
 // Packages returns the list of packages from within the LockedProject that are
 // actually used in the import graph. Some caveats:
 //
diff --git a/vendor/github.com/sdboyer/gps/lock_test.go b/vendor/github.com/sdboyer/gps/lock_test.go
index b5805029..f462b224 100644
--- a/vendor/github.com/sdboyer/gps/lock_test.go
+++ b/vendor/github.com/sdboyer/gps/lock_test.go
@@ -24,3 +24,98 @@ func TestLockedProjectSorting(t *testing.T) {
 		t.Errorf("SortLockedProject did not sort as expected:\n\t(GOT) %s\n\t(WNT) %s", lps2, lps)
 	}
 }
+
+func TestLockedProjectsEq(t *testing.T) {
+	lps := []LockedProject{
+		NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.10.0"), []string{"gps"}),
+		NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.10.0"), nil),
+		NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.10.0"), []string{"gps", "flugle"}),
+		NewLockedProject(mkPI("foo"), NewVersion("nada"), []string{"foo"}),
+		NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.10.0"), []string{"flugle", "gps"}),
+		NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.10.0").Is("278a227dfc3d595a33a77ff3f841fd8ca1bc8cd0"), []string{"gps"}),
+		NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.11.0"), []string{"gps"}),
+	}
+
+	fix := []struct {
+		l1, l2   int
+		shouldeq bool
+		err      string
+	}{
+		{0, 0, true, "lp does not eq self"},
+		{0, 5, false, "should not eq with different rev"},
+		{0, 6, false, "should not eq with different version"},
+		{5, 5, true, "should eq with same rev"},
+		{0, 1, false, "should not eq when other pkg list is empty"},
+		{0, 2, false, "should not eq when other pkg list is longer"},
+		{2, 4, false, "should not eq when pkg lists are out of order"},
+		{0, 3, false, "should not eq totally different lp"},
+	}
+
+	for _, f := range fix {
+		if f.shouldeq {
+			if !lps[f.l1].Eq(lps[f.l2]) {
+				t.Error(f.err)
+			}
+			if !lps[f.l2].Eq(lps[f.l1]) {
+				t.Error(f.err + (" (reversed)"))
+			}
+		} else {
+			if lps[f.l1].Eq(lps[f.l2]) {
+				t.Error(f.err)
+			}
+			if lps[f.l2].Eq(lps[f.l1]) {
+				t.Error(f.err + (" (reversed)"))
+			}
+
+		}
+	}
+}
+
+func TestLocksAreEq(t *testing.T) {
+	gpl := NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.10.0").Is("278a227dfc3d595a33a77ff3f841fd8ca1bc8cd0"), []string{"gps"})
+	svpl := NewLockedProject(mkPI("github.com/Masterminds/semver"), NewVersion("v2.0.0"), []string{"semver"})
+	bbbt := NewLockedProject(mkPI("github.com/beeblebrox/browntown"), NewBranch("master").Is("63fc17eb7966a6f4cc0b742bf42731c52c4ac740"), []string{"browntown", "smoochies"})
+
+	l1 := solution{
+		hd: []byte("foo"),
+		p: []LockedProject{
+			gpl,
+			bbbt,
+			svpl,
+		},
+	}
+
+	l2 := solution{
+		p: []LockedProject{
+			svpl,
+			gpl,
+		},
+	}
+
+	if LocksAreEq(l1, l2, true) {
+		t.Fatal("should have failed on hash check")
+	}
+
+	if LocksAreEq(l1, l2, false) {
+		t.Fatal("should have failed on length check")
+	}
+
+	l2.p = append(l2.p, bbbt)
+
+	if !LocksAreEq(l1, l2, false) {
+		t.Fatal("should be eq, must have failed on individual lp check")
+	}
+
+	// ensure original input sort order is maintained
+	if !l1.p[0].Eq(gpl) {
+		t.Error("checking equality resorted l1")
+	}
+	if !l2.p[0].Eq(svpl) {
+		t.Error("checking equality resorted l2")
+	}
+
+	l1.p[0] = NewLockedProject(mkPI("github.com/sdboyer/gps"), NewVersion("v0.11.0"), []string{"gps"})
+	if LocksAreEq(l1, l2, false) {
+		t.Error("should fail when individual lp were not eq")
+	}
+}
diff --git a/vendor/github.com/sdboyer/gps/manager_test.go b/vendor/github.com/sdboyer/gps/manager_test.go
index 0970c595..4dbf75c6 100644
--- a/vendor/github.com/sdboyer/gps/manager_test.go
+++ b/vendor/github.com/sdboyer/gps/manager_test.go
@@ -358,7 +358,7 @@ func TestGetSources(t *testing.T) {
 			}
 
 			// All of them _should_ select https, so this should work
-			lpi.NetworkName = "https://" + lpi.NetworkName
+			lpi.Source = "https://" + lpi.Source
 			src3, err := sm.getSourceFor(lpi)
 			if err != nil {
 				t.Errorf("(src %q) unexpected error getting explicit https source: %s", nn, err)
@@ -367,7 +367,7 @@ func TestGetSources(t *testing.T) {
 			}
 
 			// Now put in http, and they should differ
-			lpi.NetworkName = "http://" + string(lpi.ProjectRoot)
+			lpi.Source = "http://" + string(lpi.ProjectRoot)
 			src4, err := sm.getSourceFor(lpi)
 			if err != nil {
 				t.Errorf("(src %q) unexpected error getting explicit http source: %s", nn, err)
diff --git a/vendor/github.com/sdboyer/gps/manifest.go b/vendor/github.com/sdboyer/gps/manifest.go
index 4e3afb30..a5682992 100644
--- a/vendor/github.com/sdboyer/gps/manifest.go
+++ b/vendor/github.com/sdboyer/gps/manifest.go
@@ -158,7 +158,7 @@ func prepManifest(m Manifest) Manifest {
 		// normalize between these two by omitting such instances entirely, as
 		// it negates some possibility for false mismatches in input hashing.
 		if d.Constraint == nil {
-			if d.NetworkName == "" {
+			if d.Source == "" {
 				continue
 			}
 			d.Constraint = anyConstraint{}
@@ -169,7 +169,7 @@ func prepManifest(m Manifest) Manifest {
 
 	for k, d := range ddeps {
 		if d.Constraint == nil {
-			if d.NetworkName == "" {
+			if d.Source == "" {
 				continue
 			}
 			d.Constraint = anyConstraint{}
diff --git a/vendor/github.com/sdboyer/gps/manifest_test.go b/vendor/github.com/sdboyer/gps/manifest_test.go
index 8faaa189..50717b06 100644
--- a/vendor/github.com/sdboyer/gps/manifest_test.go
+++ b/vendor/github.com/sdboyer/gps/manifest_test.go
@@ -8,13 +8,13 @@ func TestPrepManifest(t *testing.T) {
 		Deps: ProjectConstraints{
 			ProjectRoot("foo"): ProjectProperties{},
 			ProjectRoot("bar"): ProjectProperties{
-				NetworkName: "whatever",
+				Source: "whatever",
 			},
 		},
 		TestDeps: ProjectConstraints{
 			ProjectRoot("baz"): ProjectProperties{},
 			ProjectRoot("qux"): ProjectProperties{
-				NetworkName: "whatever",
+				Source: "whatever",
 			},
 		},
 	}
diff --git a/vendor/github.com/sdboyer/gps/maybe_source.go b/vendor/github.com/sdboyer/gps/maybe_source.go
index 8c5191cc..d59962ae 100644
--- a/vendor/github.com/sdboyer/gps/maybe_source.go
+++ b/vendor/github.com/sdboyer/gps/maybe_source.go
@@ -82,10 +82,11 @@ func (m maybeGitSource) try(cachedir string, an ProjectAnalyzer) (source, string
 	}
 
 	src.baseVCSSource.lvfunc = src.listVersions
-
-	_, err = src.listVersions()
-	if err != nil {
-		return nil, "", err
+	if !r.CheckLocal() {
+		_, err = src.listVersions()
+		if err != nil {
+			return nil, "", err
+		}
 	}
 
 	return src, ustr, nil
@@ -129,10 +130,11 @@ func (m maybeGopkginSource) try(cachedir string, an ProjectAnalyzer) (source, st
 	}
 
 	src.baseVCSSource.lvfunc = src.listVersions
-
-	_, err = src.listVersions()
-	if err != nil {
-		return nil, "", err
+	if !r.CheckLocal() {
+		_, err = src.listVersions()
+		if err != nil {
+			return nil, "", err
+		}
 	}
 
 	return src, ustr, nil
diff --git a/vendor/github.com/sdboyer/gps/satisfy.go b/vendor/github.com/sdboyer/gps/satisfy.go
index d3a76b1f..d86c4e4a 100644
--- a/vendor/github.com/sdboyer/gps/satisfy.go
+++ b/vendor/github.com/sdboyer/gps/satisfy.go
@@ -195,8 +195,8 @@ func (s *solver) checkDepsDisallowsSelected(a atomWithPackages, cdep completeDep
 }
 
 // checkIdentMatches ensures that the LocalName of a dep introduced by an atom,
-// has the same NetworkName as what's already been selected (assuming anything's
-// been selected).
+// has the same Source as what's already been selected (assuming anything's been
+// selected).
 //
 // In other words, this ensures that the solver never simultaneously selects two
 // identifiers with the same local name, but that disagree about where their
diff --git a/vendor/github.com/sdboyer/gps/solve_basic_test.go b/vendor/github.com/sdboyer/gps/solve_basic_test.go
index 6f5f912c..982523ea 100644
--- a/vendor/github.com/sdboyer/gps/solve_basic_test.go
+++ b/vendor/github.com/sdboyer/gps/solve_basic_test.go
@@ -19,7 +19,7 @@ func nvSplit(info string) (id ProjectIdentifier, version string) {
 	if strings.Contains(info, " from ") {
 		parts := regfrom.FindStringSubmatch(info)
 		info = parts[1] + " " + parts[3]
-		id.NetworkName = parts[2]
+		id.Source = parts[2]
 	}
 
 	s := strings.SplitN(info, " ", 2)
@@ -42,7 +42,7 @@ func nvrSplit(info string) (id ProjectIdentifier, version string, revision Revis
 	if strings.Contains(info, " from ") {
 		parts := regfrom.FindStringSubmatch(info)
 		info = fmt.Sprintf("%s %s", parts[1], parts[3])
-		id.NetworkName = parts[2]
+		id.Source = parts[2]
 	}
 
 	s := strings.SplitN(info, " ", 3)
@@ -205,7 +205,7 @@ type depspec struct {
 // treated as a test-only dependency.
 func mkDepspec(pi string, deps ...string) depspec {
 	pa := mkAtom(pi)
-	if string(pa.id.ProjectRoot) != pa.id.NetworkName && pa.id.NetworkName != "" {
+	if string(pa.id.ProjectRoot) != pa.id.Source && pa.id.Source != "" {
 		panic("alternate source on self makes no sense")
 	}
 
@@ -252,9 +252,9 @@ func mkADep(atom, pdep string, c Constraint, pl ...string) dependency {
 }
 
 // mkPI creates a ProjectIdentifier with the ProjectRoot as the provided
-// string, and the NetworkName unset.
+// string, and the Source unset.
 //
-// Call normalize() on the returned value if you need the NetworkName to be be
+// Call normalize() on the returned value if you need the Source to be be
 // equal to the ProjectRoot.
 func mkPI(root string) ProjectIdentifier {
 	return ProjectIdentifier{
@@ -1274,7 +1274,7 @@ var basicFixtures = map[string]basicFixture{
 		},
 		ovr: ProjectConstraints{
 			ProjectRoot("bar"): ProjectProperties{
-				NetworkName: "bar",
+				Source: "bar",
 			},
 		},
 		r: mksolution(
diff --git a/vendor/github.com/sdboyer/gps/solve_bimodal_test.go b/vendor/github.com/sdboyer/gps/solve_bimodal_test.go
index 211887a8..d2b65c63 100644
--- a/vendor/github.com/sdboyer/gps/solve_bimodal_test.go
+++ b/vendor/github.com/sdboyer/gps/solve_bimodal_test.go
@@ -640,7 +640,7 @@ var bimodalFixtures = map[string]bimodalFixture{
 		),
 	},
 	// When a given project is initially brought in using the default (i.e.,
-	// empty) ProjectIdentifier.NetworkName, and a later, presumably
+	// empty) ProjectIdentifier.Source, and a later, presumably
 	// as-yet-undiscovered dependency specifies an alternate net addr for it, we
 	// have to fail - even though, if the deps were visited in the opposite
 	// order (deeper dep w/the alternate location first, default location
@@ -719,7 +719,7 @@ var bimodalFixtures = map[string]bimodalFixture{
 		},
 		ovr: ProjectConstraints{
 			ProjectRoot("bar"): ProjectProperties{
-				NetworkName: "baz",
+				Source: "baz",
 			},
 		},
 		r: mksolution(
@@ -740,7 +740,7 @@ var bimodalFixtures = map[string]bimodalFixture{
 		},
 		ovr: ProjectConstraints{
 			ProjectRoot("bar"): ProjectProperties{
-				NetworkName: "baz",
+				Source: "baz",
 			},
 		},
 		r: mksolution(
diff --git a/vendor/github.com/sdboyer/gps/solve_test.go b/vendor/github.com/sdboyer/gps/solve_test.go
index dd546f87..2d3de696 100644
--- a/vendor/github.com/sdboyer/gps/solve_test.go
+++ b/vendor/github.com/sdboyer/gps/solve_test.go
@@ -167,11 +167,11 @@ func solveBimodalAndCheck(fix bimodalFixture, t *testing.T) (res Solution, err e
 
 func fixtureSolveSimpleChecks(fix specfix, soln Solution, err error, t *testing.T) (Solution, error) {
 	ppi := func(id ProjectIdentifier) string {
-		// need this so we can clearly tell if there's a NetworkName or not
-		if id.NetworkName == "" {
+		// need this so we can clearly tell if there's a Source or not
+		if id.Source == "" {
 			return string(id.ProjectRoot)
 		}
-		return fmt.Sprintf("%s (from %s)", id.ProjectRoot, id.NetworkName)
+		return fmt.Sprintf("%s (from %s)", id.ProjectRoot, id.Source)
 	}
 
 	pv := func(v Version) string {
diff --git a/vendor/github.com/sdboyer/gps/solver.go b/vendor/github.com/sdboyer/gps/solver.go
index 6bb34d3b..e855f063 100644
--- a/vendor/github.com/sdboyer/gps/solver.go
+++ b/vendor/github.com/sdboyer/gps/solver.go
@@ -252,7 +252,7 @@ func Prepare(params SolveParameters, sm SourceManager) (Solver, error) {
 	// Validate no empties in the overrides map
 	var eovr []string
 	for pr, pp := range s.ovr {
-		if pp.Constraint == nil && pp.NetworkName == "" {
+		if pp.Constraint == nil && pp.Source == "" {
 			eovr = append(eovr, string(pr))
 		}
 	}
@@ -537,7 +537,7 @@ func (s *solver) selectRoot() error {
 		// If we have no lock, or if this dep isn't in the lock, then prefetch
 		// it. See longer explanation in selectAtom() for how we benefit from
 		// parallelism here.
-		if _, has := s.rlm[dep.Ident.ProjectRoot]; !has {
+		if s.needVersionsFor(dep.Ident.ProjectRoot) {
 			go s.b.SyncSourceFor(dep.Ident)
 		}
 
@@ -696,8 +696,8 @@ func (s *solver) createVersionQueue(bmi bimodalIdentifier) (*versionQueue, error
 			return nil, err
 		}
 		if exists {
-			// Project exists only in vendor (and in some manifest somewhere)
-			// TODO(sdboyer) mark this for special handling, somehow?
+			// Project exists only in vendor
+			// FIXME(sdboyer) this just totally doesn't work at all right now
 		} else {
 			return nil, fmt.Errorf("project '%s' could not be located", id)
 		}
@@ -922,6 +922,29 @@ func (s *solver) getLockVersionIfValid(id ProjectIdentifier) (Version, error) {
 	return v, nil
 }
 
+// needVersionListFor indicates whether we need a version list for a given
+// project root, based solely on general solver inputs (no constraint checking
+// required). This will be true if:
+//
+//  - ChangeAll is on
+//  - The project is not in the lock at all
+//  - The project is in the lock, but is also in the list of projects to change
+func (s *solver) needVersionsFor(pr ProjectRoot) bool {
+	if s.params.ChangeAll {
+		return true
+	}
+
+	if _, has := s.rlm[pr]; !has {
+		// not in the lock
+		return true
+	} else if _, has := s.chng[pr]; has {
+		// in the lock, but marked for change
+		return true
+	}
+	// in the lock, not marked for change
+	return false
+}
+
 // backtrack works backwards from the current failed solution to find the next
 // solution to try.
 func (s *solver) backtrack() bool {
@@ -1144,13 +1167,13 @@ func (s *solver) selectAtom(a atomWithPackages, pkgonly bool) {
 		// few microseconds before blocking later. Best case, the dep doesn't
 		// come up next, but some other dep comes up that wasn't prefetched, and
 		// both fetches proceed in parallel.
-		if _, has := s.rlm[dep.Ident.ProjectRoot]; !has {
+		if s.needVersionsFor(dep.Ident.ProjectRoot) {
 			go s.b.SyncSourceFor(dep.Ident)
 		}
 
 		s.sel.pushDep(dependency{depender: a.a, dep: dep})
 		// Go through all the packages introduced on this dep, selecting only
-		// the ones where the only depper on them is what the previous line just
+		// the ones where the only depper on them is what the preceding line just
 		// pushed in. Then, put those into the unselected queue.
 		rpm := s.sel.getRequiredPackagesIn(dep.Ident)
 		var newp []string
diff --git a/vendor/github.com/sdboyer/gps/source.go b/vendor/github.com/sdboyer/gps/source.go
index 01bb8c01..e127da34 100644
--- a/vendor/github.com/sdboyer/gps/source.go
+++ b/vendor/github.com/sdboyer/gps/source.go
@@ -97,23 +97,30 @@ func (bs *baseVCSSource) getManifestAndLock(r ProjectRoot, v Version) (Manifest,
 	}
 
 	// Cache didn't help; ensure our local is fully up to date.
-	err = bs.syncLocal()
-	if err != nil {
-		return nil, nil, err
+	do := func() (err error) {
+		bs.crepo.mut.Lock()
+		// Always prefer a rev, if it's available
+		if pv, ok := v.(PairedVersion); ok {
+			err = bs.crepo.r.UpdateVersion(pv.Underlying().String())
+		} else {
+			err = bs.crepo.r.UpdateVersion(v.String())
+		}
+
+		bs.crepo.mut.Unlock()
+		return
 	}
 
-	bs.crepo.mut.Lock()
-	// Always prefer a rev, if it's available
-	if pv, ok := v.(PairedVersion); ok {
-		err = bs.crepo.r.UpdateVersion(pv.Underlying().String())
-	} else {
-		err = bs.crepo.r.UpdateVersion(v.String())
-	}
-	bs.crepo.mut.Unlock()
+	if err = do(); err != nil {
+		// minimize network activity: only force local syncing if we had an err
+		err = bs.syncLocal()
+		if err != nil {
+			return nil, nil, err
+		}
 
-	if err != nil {
-		// TODO(sdboyer) More-er proper-er error
-		panic(fmt.Sprintf("canary - why is checkout/whatever failing: %s %s %s", bs.crepo.r.LocalPath(), v.String(), unwrapVcsErr(err)))
+		if err = do(); err != nil {
+			// TODO(sdboyer) More-er proper-er error
+			panic(fmt.Sprintf("canary - why is checkout/whatever failing: %s %s %s", bs.crepo.r.LocalPath(), v.String(), unwrapVcsErr(err)))
+		}
 	}
 
 	bs.crepo.mut.RLock()
diff --git a/vendor/github.com/sdboyer/gps/source_manager.go b/vendor/github.com/sdboyer/gps/source_manager.go
index d5fe2526..ce863076 100644
--- a/vendor/github.com/sdboyer/gps/source_manager.go
+++ b/vendor/github.com/sdboyer/gps/source_manager.go
@@ -305,7 +305,6 @@ func (sm *SourceMgr) DeduceProjectRoot(ip string) (ProjectRoot, error) {
 }
 
 func (sm *SourceMgr) getSourceFor(id ProjectIdentifier) (source, error) {
-	//pretty.Println(id.ProjectRoot)
 	nn := id.netName()
 
 	sm.srcmut.RLock()
diff --git a/vendor/github.com/sdboyer/gps/types.go b/vendor/github.com/sdboyer/gps/types.go
index 25e9138f..8b842cc1 100644
--- a/vendor/github.com/sdboyer/gps/types.go
+++ b/vendor/github.com/sdboyer/gps/types.go
@@ -44,10 +44,10 @@ type ProjectRoot string
 // ProjectRoot. In gps' current design, this ProjectRoot almost always
 // corresponds to the root of a repository.
 //
-// Second, ProjectIdentifiers can optionally carry a NetworkName, which
+// Second, ProjectIdentifiers can optionally carry a Source, which
 // identifies where the underlying source code can be located on the network.
 // These can be either a full URL, including protocol, or plain import paths.
-// So, these are all valid data for NetworkName:
+// So, these are all valid data for Source:
 //
 //  github.com/sdboyer/gps
 //  github.com/fork/gps
@@ -61,19 +61,19 @@ type ProjectRoot string
 //
 // Note that gps makes no guarantees about the actual import paths contained in
 // a repository aligning with ImportRoot. If tools, or their users, specify an
-// alternate NetworkName that contains a repository with incompatible internal
+// alternate Source that contains a repository with incompatible internal
 // import paths, gps' solving operations will error. (gps does no import
 // rewriting.)
 //
 // Also note that if different projects' manifests report a different
-// NetworkName for a given ImportRoot, it is a solve failure. Everyone has to
+// Source for a given ImportRoot, it is a solve failure. Everyone has to
 // agree on where a given import path should be sourced from.
 //
-// If NetworkName is not explicitly set, gps will derive the network address from
+// If Source is not explicitly set, gps will derive the network address from
 // the ImportRoot using a similar algorithm to that utilized by `go get`.
 type ProjectIdentifier struct {
 	ProjectRoot ProjectRoot
-	NetworkName string
+	Source      string
 }
 
 func (i ProjectIdentifier) less(j ProjectIdentifier) bool {
@@ -91,12 +91,12 @@ func (i ProjectIdentifier) eq(j ProjectIdentifier) bool {
 	if i.ProjectRoot != j.ProjectRoot {
 		return false
 	}
-	if i.NetworkName == j.NetworkName {
+	if i.Source == j.Source {
 		return true
 	}
 
-	if (i.NetworkName == "" && j.NetworkName == string(j.ProjectRoot)) ||
-		(j.NetworkName == "" && i.NetworkName == string(i.ProjectRoot)) {
+	if (i.Source == "" && j.Source == string(j.ProjectRoot)) ||
+		(j.Source == "" && i.Source == string(i.ProjectRoot)) {
 		return true
 	}
 
@@ -108,22 +108,22 @@ func (i ProjectIdentifier) eq(j ProjectIdentifier) bool {
 //
 // Given that the ProjectRoots are equal (==), equivalency occurs if:
 //
-// 1. The NetworkNames are equal (==), OR
-// 2. The LEFT (the receiver) NetworkName is non-empty, and the right
-// NetworkName is empty.
+// 1. The Sources are equal (==), OR
+// 2. The LEFT (the receiver) Source is non-empty, and the right
+// Source is empty.
 //
 // *This is asymmetry in this binary relation is intentional.* It facilitates
-// the case where we allow for a ProjectIdentifier with an explicit NetworkName
+// the case where we allow for a ProjectIdentifier with an explicit Source
 // to match one without.
 func (i ProjectIdentifier) equiv(j ProjectIdentifier) bool {
 	if i.ProjectRoot != j.ProjectRoot {
 		return false
 	}
-	if i.NetworkName == j.NetworkName {
+	if i.Source == j.Source {
 		return true
 	}
 
-	if i.NetworkName != "" && j.NetworkName == "" {
+	if i.Source != "" && j.Source == "" {
 		return true
 	}
 
@@ -131,22 +131,22 @@ func (i ProjectIdentifier) equiv(j ProjectIdentifier) bool {
 }
 
 func (i ProjectIdentifier) netName() string {
-	if i.NetworkName == "" {
+	if i.Source == "" {
 		return string(i.ProjectRoot)
 	}
-	return i.NetworkName
+	return i.Source
 }
 
 func (i ProjectIdentifier) errString() string {
-	if i.NetworkName == "" || i.NetworkName == string(i.ProjectRoot) {
+	if i.Source == "" || i.Source == string(i.ProjectRoot) {
 		return string(i.ProjectRoot)
 	}
-	return fmt.Sprintf("%s (from %s)", i.ProjectRoot, i.NetworkName)
+	return fmt.Sprintf("%s (from %s)", i.ProjectRoot, i.Source)
 }
 
 func (i ProjectIdentifier) normalize() ProjectIdentifier {
-	if i.NetworkName == "" {
-		i.NetworkName = string(i.ProjectRoot)
+	if i.Source == "" {
+		i.Source = string(i.ProjectRoot)
 	}
 
 	return i
@@ -159,8 +159,8 @@ func (i ProjectIdentifier) normalize() ProjectIdentifier {
 // ProjectProperties; they make little sense without their corresponding
 // ProjectRoot.
 type ProjectProperties struct {
-	NetworkName string
-	Constraint  Constraint
+	Source     string
+	Constraint Constraint
 }
 
 // Package represents a Go package. It contains a subset of the information
diff --git a/vendor/github.com/sdboyer/gps/util.go b/vendor/github.com/sdboyer/gps/util.go
new file mode 100644
index 00000000..45d3dff7
--- /dev/null
+++ b/vendor/github.com/sdboyer/gps/util.go
@@ -0,0 +1,165 @@
+package gps
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"runtime"
+	"syscall"
+)
+
+// renameWithFallback attempts to rename a file or directory, but falls back to
+// copying in the event of a cross-link device error. If the fallback copy
+// succeeds, src is still removed, emulating normal rename behavior.
+func renameWithFallback(src, dest string) error {
+	fi, err := os.Stat(src)
+	if err != nil {
+		return err
+	}
+
+	err = os.Rename(src, dest)
+	if err == nil {
+		return nil
+	}
+
+	terr, ok := err.(*os.LinkError)
+	if !ok {
+		return err
+	}
+
+	// Rename may fail if src and dest are on different devices; fall back to
+	// copy if we detect that case. syscall.EXDEV is the common name for the
+	// cross device link error which has varying output text across different
+	// operating systems.
+	var cerr error
+	if terr.Err == syscall.EXDEV {
+		if fi.IsDir() {
+			cerr = copyDir(src, dest)
+		} else {
+			cerr = copyFile(src, dest)
+		}
+	} else if runtime.GOOS == "windows" {
+		// In windows it can drop down to an operating system call that
+		// returns an operating system error with a different number and
+		// message. Checking for that as a fall back.
+		noerr, ok := terr.Err.(syscall.Errno)
+		// 0x11 (ERROR_NOT_SAME_DEVICE) is the windows error.
+		// See https://msdn.microsoft.com/en-us/library/cc231199.aspx
+		if ok && noerr == 0x11 {
+			if fi.IsDir() {
+				cerr = copyDir(src, dest)
+			} else {
+				cerr = copyFile(src, dest)
+			}
+		}
+	} else {
+		return terr
+	}
+
+	if cerr != nil {
+		return cerr
+	}
+
+	return os.RemoveAll(src)
+}
+
+// copyDir recursively copies a directory tree, attempting to preserve permissions.
+// Source directory must exist, destination directory must *not* exist.
+// Symlinks are ignored and skipped.
+func copyDir(src string, dst string) (err error) {
+	src = filepath.Clean(src)
+	dst = filepath.Clean(dst)
+
+	si, err := os.Stat(src)
+	if err != nil {
+		return err
+	}
+	if !si.IsDir() {
+		return fmt.Errorf("source is not a directory")
+	}
+
+	_, err = os.Stat(dst)
+	if err != nil && !os.IsNotExist(err) {
+		return
+	}
+	if err == nil {
+		return fmt.Errorf("destination already exists")
+	}
+
+	err = os.MkdirAll(dst, si.Mode())
+	if err != nil {
+		return
+	}
+
+	entries, err := ioutil.ReadDir(src)
+	if err != nil {
+		return
+	}
+
+	for _, entry := range entries {
+		srcPath := filepath.Join(src, entry.Name())
+		dstPath := filepath.Join(dst, entry.Name())
+
+		if entry.IsDir() {
+			err = copyDir(srcPath, dstPath)
+			if err != nil {
+				return
+			}
+		} else {
+			// This will include symlinks, which is what we want in all cases
+			// where gps is copying things.
+			err = copyFile(srcPath, dstPath)
+			if err != nil {
+				return
+			}
+		}
+	}
+
+	return
+}
+
+// copyFile copies the contents of the file named src to the file named
+// by dst. The file will be created if it does not already exist. If the
+// destination file exists, all it's contents will be replaced by the contents
+// of the source file. The file mode will be copied from the source and
+// the copied data is synced/flushed to stable storage.
+func copyFile(src, dst string) (err error) {
+	in, err := os.Open(src)
+	if err != nil {
+		return
+	}
+	defer in.Close()
+
+	out, err := os.Create(dst)
+	if err != nil {
+		return
+	}
+	defer func() {
+		if e := out.Close(); e != nil {
+			err = e
+		}
+	}()
+
+	_, err = io.Copy(out, in)
+	if err != nil {
+		return
+	}
+
+	err = out.Sync()
+	if err != nil {
+		return
+	}
+
+	si, err := os.Stat(src)
+	if err != nil {
+		return
+	}
+	err = os.Chmod(dst, si.Mode())
+	if err != nil {
+		return
+	}
+
+	return
+}
diff --git a/vendor/github.com/sdboyer/gps/util_test.go b/vendor/github.com/sdboyer/gps/util_test.go
new file mode 100644
index 00000000..036edbf7
--- /dev/null
+++ b/vendor/github.com/sdboyer/gps/util_test.go
@@ -0,0 +1,131 @@
+package gps
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func isDir(name string) (bool, error) {
+	fi, err := os.Stat(name)
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	if err != nil {
+		return false, err
+	}
+	if !fi.IsDir() {
+		return false, fmt.Errorf("%q is not a directory", name)
+	}
+	return true, nil
+}
+
+func TestCopyDir(t *testing.T) {
+	dir, err := ioutil.TempDir("", "gps")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
+
+	srcdir := filepath.Join(dir, "src")
+	if err := os.MkdirAll(srcdir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	srcf, err := os.Create(filepath.Join(srcdir, "myfile"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	contents := "hello world"
+	if _, err := srcf.Write([]byte(contents)); err != nil {
+		t.Fatal(err)
+	}
+	srcf.Close()
+
+	destdir := filepath.Join(dir, "dest")
+	if err := copyDir(srcdir, destdir); err != nil {
+		t.Fatal(err)
+	}
+
+	dirOK, err := isDir(destdir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !dirOK {
+		t.Fatalf("expected %s to be a directory", destdir)
+	}
+
+	destf := filepath.Join(destdir, "myfile")
+	destcontents, err := ioutil.ReadFile(destf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if contents != string(destcontents) {
+		t.Fatalf("expected: %s, got: %s", contents, string(destcontents))
+	}
+
+	srcinfo, err := os.Stat(srcf.Name())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	destinfo, err := os.Stat(destf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if srcinfo.Mode() != destinfo.Mode() {
+		t.Fatalf("expected %s: %#v\n to be the same mode as %s: %#v", srcf.Name(), srcinfo.Mode(), destf, destinfo.Mode())
+	}
+}
+
+func TestCopyFile(t *testing.T) {
+	dir, err := ioutil.TempDir("", "gps")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
+
+	srcf, err := os.Create(filepath.Join(dir, "srcfile"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	contents := "hello world"
+	if _, err := srcf.Write([]byte(contents)); err != nil {
+		t.Fatal(err)
+	}
+	srcf.Close()
+
+	destf := filepath.Join(dir, "destf")
+	if err := copyFile(srcf.Name(), destf); err != nil {
+		t.Fatal(err)
+	}
+
+	destcontents, err := ioutil.ReadFile(destf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if contents != string(destcontents) {
+		t.Fatalf("expected: %s, got: %s", contents, string(destcontents))
+	}
+
+	srcinfo, err := os.Stat(srcf.Name())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	destinfo, err := os.Stat(destf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if srcinfo.Mode() != destinfo.Mode() {
+		t.Fatalf("expected %s: %#v\n to be the same mode as %s: %#v", srcf.Name(), srcinfo.Mode(), destf, destinfo.Mode())
+	}
+}
diff --git a/vendor/github.com/sdboyer/gps/vcs_source.go b/vendor/github.com/sdboyer/gps/vcs_source.go
index 526ad52e..cc78be17 100644
--- a/vendor/github.com/sdboyer/gps/vcs_source.go
+++ b/vendor/github.com/sdboyer/gps/vcs_source.go
@@ -11,7 +11,6 @@ import (
 
 	"github.com/Masterminds/semver"
 	"github.com/Masterminds/vcs"
-	"github.com/termie/go-shutil"
 )
 
 // Kept here as a reference in case it does become important to implement a
@@ -47,13 +46,13 @@ func (s *gitSource) exportVersionTo(v Version, to string) error {
 
 		// Back up original index
 		idx, bak := filepath.Join(r.LocalPath(), ".git", "index"), filepath.Join(r.LocalPath(), ".git", "origindex")
-		err := os.Rename(idx, bak)
+		err := renameWithFallback(idx, bak)
 		if err != nil {
 			return err
 		}
 
 		// could have an err here...but it's hard to imagine how?
-		defer os.Rename(bak, idx)
+		defer renameWithFallback(bak, idx)
 
 		vstr := v.String()
 		if rv, ok := v.(PairedVersion); ok {
@@ -635,30 +634,10 @@ func (r *repo) exportVersionTo(v Version, to string) error {
 
 	r.r.UpdateVersion(v.String())
 
-	// TODO(sdboyer) This is a dumb, slow approach, but we're punting on making
-	// these fast for now because git is the OVERWHELMING case (it's handled in
-	// its own method)
-
-	cfg := &shutil.CopyTreeOptions{
-		Symlinks:     true,
-		CopyFunction: shutil.Copy,
-		Ignore: func(src string, contents []os.FileInfo) (ignore []string) {
-			for _, fi := range contents {
-				if !fi.IsDir() {
-					continue
-				}
-				n := fi.Name()
-				switch n {
-				case "vendor", ".bzr", ".svn", ".hg":
-					ignore = append(ignore, n)
-				}
-			}
-
-			return
-		},
-	}
-
-	return shutil.CopyTree(r.rpath, to, cfg)
+	// TODO(sdboyer) this is a simplistic approach and relying on the tools
+	// themselves might make it faster, but git's the overwhelming case (and has
+	// its own method) so fine for now
+	return copyDir(r.rpath, to)
 }
 
 // This func copied from Masterminds/vcs so we can exec our own commands
diff --git a/vendor/github.com/termie/go-shutil/.gitignore b/vendor/github.com/termie/go-shutil/.gitignore
deleted file mode 100644
index 139b1ee7..00000000
--- a/vendor/github.com/termie/go-shutil/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-test/testfile3
diff --git a/vendor/github.com/termie/go-shutil/LICENSE b/vendor/github.com/termie/go-shutil/LICENSE
deleted file mode 100644
index 3890b94b..00000000
--- a/vendor/github.com/termie/go-shutil/LICENSE
+++ /dev/null
@@ -1 +0,0 @@
-I guess Python's? If that doesn't apply then MIT. Have fun.
diff --git a/vendor/github.com/termie/go-shutil/README.rst b/vendor/github.com/termie/go-shutil/README.rst
deleted file mode 100644
index b63b016f..00000000
--- a/vendor/github.com/termie/go-shutil/README.rst
+++ /dev/null
@@ -1,24 +0,0 @@
-=========================================
-High-level Filesystem Operations (for Go)
-=========================================
-
-
-A direct port of a few of the functions from Python's shutil package for
-high-level filesystem operations.
-
-This project pretty much only exists so that other people don't have to keep
-re-writing this code in their projects, at this time we have been unable to
-find any helpful packages for this in the stdlib or elsewhere.
-
-We don't expect it to be perfect, just better than whatever your first draft
-would have been. Patches welcome.
-
-See also: https://docs.python.org/3.5/library/shutil.html
-
-================
-Functions So Far
-================
-
-We support Copy, CopyFile, CopyMode, and CopyTree. CopyStat would be nice if
-anybody wants to write that. Also the other functions that might be useful in
-the python library :D
diff --git a/vendor/github.com/termie/go-shutil/shutil.go b/vendor/github.com/termie/go-shutil/shutil.go
deleted file mode 100644
index 09fcd38a..00000000
--- a/vendor/github.com/termie/go-shutil/shutil.go
+++ /dev/null
@@ -1,326 +0,0 @@
-package shutil
-
-import (
-  "fmt"
-  "io"
-  "io/ioutil"
-  "os"
-  "path/filepath"
-)
-
-
-type SameFileError struct {
-  Src string
-  Dst string
-}
-
-func (e SameFileError) Error() string {
-  return fmt.Sprintf("%s and %s are the same file", e.Src, e.Dst)
-}
-
-type SpecialFileError struct {
-  File string
-  FileInfo os.FileInfo
-}
-
-func (e SpecialFileError) Error() string {
-  return fmt.Sprintf("`%s` is a named pipe", e.File)
-}
-
-type NotADirectoryError struct {
-  Src string
-}
-
-func (e NotADirectoryError) Error() string {
-  return fmt.Sprintf("`%s` is not a directory", e.Src)
-}
-
-
-type AlreadyExistsError struct {
-  Dst string
-}
-
-func (e AlreadyExistsError) Error() string {
-  return fmt.Sprintf("`%s` already exists", e.Dst)
-}
-
-
-func samefile(src string, dst string) bool {
-  srcInfo, _ := os.Stat(src)
-  dstInfo, _ := os.Stat(dst)
-  return os.SameFile(srcInfo, dstInfo)
-}
-
-func specialfile(fi os.FileInfo) bool {
-  return (fi.Mode() & os.ModeNamedPipe) == os.ModeNamedPipe
-}
-
-func stringInSlice(a string, list []string) bool {
-    for _, b := range list {
-        if b == a {
-            return true
-        }
-    }
-    return false
-}
-
-func IsSymlink(fi os.FileInfo) bool {
-  return (fi.Mode() & os.ModeSymlink) == os.ModeSymlink
-}
-
-
-// Copy data from src to dst
-//
-// If followSymlinks is not set and src is a symbolic link, a
-// new symlink will be created instead of copying the file it points
-// to.
-func CopyFile(src, dst string, followSymlinks bool) (error) {
-  if samefile(src, dst) {
-    return &SameFileError{src, dst}
-  }
-
-  // Make sure src exists and neither are special files
-  srcStat, err := os.Lstat(src)
-  if err != nil {
-    return err
-  }
-  if specialfile(srcStat) {
-    return &SpecialFileError{src, srcStat}
-  }
-
-  dstStat, err := os.Stat(dst)
-  if err != nil && !os.IsNotExist(err) {
-    return err
-  } else if err == nil {
-    if specialfile(dstStat) {
-      return &SpecialFileError{dst, dstStat}
-    }
-  }
-
-  // If we don't follow symlinks and it's a symlink, just link it and be done
-  if !followSymlinks && IsSymlink(srcStat) {
-    return os.Symlink(src, dst)
-  }
-
-  // If we are a symlink, follow it
-  if IsSymlink(srcStat) {
-    src, err = os.Readlink(src)
-    if err != nil {
-      return err
-    }
-    srcStat, err = os.Stat(src)
-    if err != nil {
-      return err
-    }
-  }
-
-  // Do the actual copy
-  fsrc, err := os.Open(src)
-  if err != nil {
-    return err
-  }
-  defer fsrc.Close()
-
-  fdst, err := os.Create(dst)
-  if err != nil {
-    return err
-  }
-  defer fdst.Close()
-
-  size, err := io.Copy(fdst, fsrc)
-  if err != nil {
-    return err
-  }
-
-  if size != srcStat.Size() {
-    return fmt.Errorf("%s: %d/%d copied", src, size, srcStat.Size())
-  }
-
-  return nil
-}
-
-
-// Copy mode bits from src to dst.
-//
-// If followSymlinks is false, symlinks aren't followed if and only
-// if both `src` and `dst` are symlinks. If `lchmod` isn't available
-// and both are symlinks this does nothing. (I don't think lchmod is
-// available in Go)
-func CopyMode(src, dst string, followSymlinks bool) error {
-  srcStat, err := os.Lstat(src)
-  if err != nil {
-    return err
-  }
-
-  dstStat, err := os.Lstat(dst)
-  if err != nil {
-    return err
-  }
-
-  // They are both symlinks and we can't change mode on symlinks.
-  if !followSymlinks && IsSymlink(srcStat) && IsSymlink(dstStat) {
-    return nil
-  }
-
-  // Atleast one is not a symlink, get the actual file stats
-  srcStat, _ = os.Stat(src)
-  err = os.Chmod(dst, srcStat.Mode())
-  return err
-}
-
-
-// Copy data and mode bits ("cp src dst"). Return the file's destination.
-//
-// The destination may be a directory.
-//
-// If followSymlinks is false, symlinks won't be followed. This
-// resembles GNU's "cp -P src dst".
-//
-// If source and destination are the same file, a SameFileError will be
-// rased.
-func Copy(src, dst string, followSymlinks bool) (string, error){
-  dstInfo, err := os.Stat(dst)
-
-  if err == nil && dstInfo.Mode().IsDir() {
-    dst = filepath.Join(dst, filepath.Base(src))
-  }
-
-  if err != nil && !os.IsNotExist(err) {
-    return dst, err
-  }
-
-  err = CopyFile(src, dst, followSymlinks)
-  if err != nil {
-    return dst, err
-  }
-
-  err = CopyMode(src, dst, followSymlinks)
-  if err != nil {
-    return dst, err
-  }
-
-  return dst, nil
-}
-
-type CopyTreeOptions struct {
-  Symlinks bool
-  IgnoreDanglingSymlinks bool
-  CopyFunction func (string, string, bool) (string, error)
-  Ignore func (string, []os.FileInfo) []string
-}
-
-// Recursively copy a directory tree.
-//
-// The destination directory must not already exist.
-//
-// If the optional Symlinks flag is true, symbolic links in the
-// source tree result in symbolic links in the destination tree; if
-// it is false, the contents of the files pointed to by symbolic
-// links are copied. If the file pointed by the symlink doesn't
-// exist, an error will be returned.
-//
-// You can set the optional IgnoreDanglingSymlinks flag to true if you
-// want to silence this error. Notice that this has no effect on
-// platforms that don't support os.Symlink.
-//
-// The optional ignore argument is a callable. If given, it
-// is called with the `src` parameter, which is the directory
-// being visited by CopyTree(), and `names` which is the list of
-// `src` contents, as returned by ioutil.ReadDir():
-//
-//   callable(src, entries) -> ignoredNames
-//
-// Since CopyTree() is called recursively, the callable will be
-// called once for each directory that is copied. It returns a
-// list of names relative to the `src` directory that should
-// not be copied.
-//
-// The optional copyFunction argument is a callable that will be used
-// to copy each file. It will be called with the source path and the
-// destination path as arguments. By default, Copy() is used, but any
-// function that supports the same signature (like Copy2() when it
-// exists) can be used.
-func CopyTree(src, dst string, options *CopyTreeOptions) error {
-  if options == nil {
-    options = &CopyTreeOptions{Symlinks:false,
-                               Ignore:nil,
-                               CopyFunction:Copy,
-                               IgnoreDanglingSymlinks:false}
-  }
-
-
-  srcFileInfo, err := os.Stat(src)
-  if err != nil {
-    return err
-  }
-
-  if !srcFileInfo.IsDir() {
-    return &NotADirectoryError{src}
-  }
-
-  _, err = os.Open(dst)
-  if !os.IsNotExist(err) {
-    return &AlreadyExistsError{dst}
-  }
-
-  entries, err := ioutil.ReadDir(src)
-  if err != nil {
-    return err
-  }
-
-  err = os.MkdirAll(dst, srcFileInfo.Mode())
-  if err != nil {
-    return err
-  }
-
-  ignoredNames := []string{}
-  if options.Ignore != nil {
-    ignoredNames = options.Ignore(src, entries)
-  }
-
-  for _, entry := range entries {
-    if stringInSlice(entry.Name(), ignoredNames) {
-      continue
-    }
-    srcPath := filepath.Join(src, entry.Name())
-    dstPath := filepath.Join(dst, entry.Name())
-
-    entryFileInfo, err := os.Lstat(srcPath)
-    if err != nil {
-      return err
-    }
-
-    // Deal with symlinks
-    if IsSymlink(entryFileInfo) {
-      linkTo, err := os.Readlink(srcPath)
-      if err != nil {
-        return err
-      }
-      if options.Symlinks {
-        os.Symlink(linkTo, dstPath)
-        //CopyStat(srcPath, dstPath, false)
-      } else {
-        // ignore dangling symlink if flag is on
-        _, err = os.Stat(linkTo)
-        if os.IsNotExist(err) && options.IgnoreDanglingSymlinks {
-          continue
-        }
-        _, err = options.CopyFunction(srcPath, dstPath, false)
-        if err != nil {
-          return err
-        }
-      }
-    } else if entryFileInfo.IsDir() {
-      err = CopyTree(srcPath, dstPath, options)
-      if err != nil {
-        return err
-      }
-    } else {
-      _, err = options.CopyFunction(srcPath, dstPath, false)
-      if err != nil {
-        return err
-      }
-    }
-  }
-  return nil
-}
diff --git a/vendor/github.com/termie/go-shutil/shutil_test.go b/vendor/github.com/termie/go-shutil/shutil_test.go
deleted file mode 100644
index f6ec2619..00000000
--- a/vendor/github.com/termie/go-shutil/shutil_test.go
+++ /dev/null
@@ -1,156 +0,0 @@
-package shutil
-
-import (
-  "bytes"
-  "io/ioutil"
-  "os"
-  "testing"
-)
-
-
-func filesMatch(src, dst string) (bool, error) {
-  srcContents, err := ioutil.ReadFile(src)
-  if err != nil {
-    return false, err
-  }
-
-  dstContents, err := ioutil.ReadFile(dst)
-  if err != nil {
-    return false, err
-  }
-
-  if bytes.Compare(srcContents, dstContents) != 0 {
-    return false, nil
-  }
-  return true, nil
-}
-
-
-func TestSameFileError(t *testing.T) {
-  _, err := Copy("test/testfile", "test/testfile", false)
-  _, ok := err.(*SameFileError)
-  if !ok {
-    t.Error(err)
-  }
-}
-
-
-func TestCopyFile(t *testing.T) {
-  // clear out existing files if they exist
-  os.Remove("test/testfile3")
-
-  err := CopyFile("test/testfile", "test/testfile3", false)
-  if err != nil {
-    t.Error(err)
-    return
-  }
-
-  match, err := filesMatch("test/testfile", "test/testfile3")
-  if err != nil {
-    t.Error(err)
-    return
-  }
-  if !match {
-    t.Fail()
-    return
-  }
-
-  // And again without clearing the files
-  err = CopyFile("test/testfile2", "test/testfile3", false)
-  if err != nil {
-    t.Error(err)
-    return
-  }
-
-  match2, err := filesMatch("test/testfile2", "test/testfile3")
-  if err != nil {
-    t.Error(err)
-    return
-  }
-
-  if !match2 {
-    t.Fail()
-    return
-  }
-}
-
-
-func TestCopy(t *testing.T) {
-  // clear out existing files if they exist
-  os.Remove("test/testfile3")
-
-  _, err := Copy("test/testfile", "test/testfile3", false)
-  if err != nil {
-    t.Error(err)
-    return
-  }
-
-  match, err := filesMatch("test/testfile", "test/testfile3")
-  if err != nil {
-    t.Error(err)
-    return
-  }
-  if !match {
-    t.Fail()
-    return
-  }
-
-  // And again without clearing the files
-  _, err = Copy("test/testfile2", "test/testfile3", false)
-  if err != nil {
-    t.Error(err)
-    return
-  }
-
-  match2, err := filesMatch("test/testfile2", "test/testfile3")
-  if err != nil {
-    t.Error(err)
-    return
-  }
-
-  if !match2 {
-    t.Fail()
-    return
-  }
-}
-
-
-func TestCopyTree(t *testing.T) {
-  // clear out existing files if they exist
-  os.RemoveAll("test/testdir3")
-
-  err := CopyTree("test/testdir", "test/testdir3", nil)
-  if err != nil {
-    t.Error(err)
-    return
-  }
-
-  match, err := filesMatch("test/testdir/file1", "test/testdir3/file1")
-  if err != nil {
-    t.Error(err)
-    return
-  }
-  if !match {
-    t.Fail()
-    return
-  }
-
-  // // And again without clearing the files
-  // _, err = Copy("test/testfile2", "test/testfile3", false)
-  // if err != nil {
-  //   t.Error(err)
-  //   return
-  // }
-
-  // match2, err := filesMatch("test/testfile2", "test/testfile3")
-  // if err != nil {
-  //   t.Error(err)
-  //   return
-  // }
-
-  // if !match2 {
-  //   t.Fail()
-  //   return
-  // }
-}
-
diff --git a/vendor/github.com/termie/go-shutil/test/testdir/file1 b/vendor/github.com/termie/go-shutil/test/testdir/file1
deleted file mode 100644
index e2129701..00000000
--- a/vendor/github.com/termie/go-shutil/test/testdir/file1
+++ /dev/null
@@ -1 +0,0 @@
-file1
diff --git a/vendor/github.com/termie/go-shutil/test/testdir/file2 b/vendor/github.com/termie/go-shutil/test/testdir/file2
deleted file mode 100644
index 6c493ff7..00000000
--- a/vendor/github.com/termie/go-shutil/test/testdir/file2
+++ /dev/null
@@ -1 +0,0 @@
-file2
diff --git a/vendor/github.com/termie/go-shutil/test/testfile b/vendor/github.com/termie/go-shutil/test/testfile
deleted file mode 100644
index 26918572..00000000
--- a/vendor/github.com/termie/go-shutil/test/testfile
+++ /dev/null
@@ -1 +0,0 @@
-testfile
diff --git a/vendor/github.com/termie/go-shutil/test/testfile2 b/vendor/github.com/termie/go-shutil/test/testfile2
deleted file mode 100644
index 7d576476..00000000
--- a/vendor/github.com/termie/go-shutil/test/testfile2
+++ /dev/null
@@ -1 +0,0 @@
-testfile2