diff --git a/app/build/ui.go b/app/build/ui.go
index e02ae4a0..816d13fe 100644
--- a/app/build/ui.go
+++ b/app/build/ui.go
@@ -159,6 +159,10 @@ func (s builderOrder) Less(i, j int) bool {
 }
 
 func builderPriority(builder string) int {
+	// Put -temp builders at the end, always.
+	if strings.HasSuffix(builder, "-temp") {
+		return 20
+	}
 	// Group race builders together.
 	if isRace(builder) {
 		return 1
@@ -175,6 +179,13 @@ func isRace(s string) bool {
 	return strings.Contains(s, "-race-") || strings.HasSuffix(s, "-race")
 }
 
+func unsupported(builder string) bool {
+	if strings.HasSuffix(builder, "-temp") {
+		return true
+	}
+	return unsupportedOS(builderOS(builder))
+}
+
 func unsupportedOS(os string) bool {
 	if os == "race" {
 		return false
@@ -257,7 +268,7 @@ var tmplFuncs = template.FuncMap{
 	"shortHash":         shortHash,
 	"shortUser":         shortUser,
 	"tail":              tail,
-	"unsupportedOS":     unsupportedOS,
+	"unsupported":       unsupported,
 }
 
 func splitDash(s string) (string, string) {
@@ -318,8 +329,9 @@ func builderArchChar(s string) string {
 }
 
 type builderSpan struct {
-	N  int
-	OS string
+	N           int
+	OS          string
+	Unsupported bool
 }
 
 // builderSpans creates a list of tags showing
@@ -330,10 +342,11 @@ func builderSpans(s []string) []builderSpan {
 	for len(s) > 0 {
 		i := 1
 		os := builderOSOrRace(s[0])
+		u := unsupportedOS(os) || strings.HasSuffix(s[0], "-temp")
 		for i < len(s) && builderOSOrRace(s[i]) == os {
 			i++
 		}
-		sp = append(sp, builderSpan{i, os})
+		sp = append(sp, builderSpan{i, os, u})
 		s = s[i:]
 	}
 	return sp
diff --git a/app/build/ui.html b/app/build/ui.html
index 96fa6ea7..e4af7aff 100644
--- a/app/build/ui.html
+++ b/app/build/ui.html
@@ -47,7 +47,7 @@
     <table class="build">
       <colgroup class="col-hash" {{if $.Package.Path}}span="2"{{end}}></colgroup>
     {{range $.Builders | builderSpans}}
-      <colgroup class="col-result{{if (unsupportedOS .OS)}} unsupported{{end}}" span="{{.N}}"></colgroup>
+      <colgroup class="col-result{{if .Unsupported}} unsupported{{end}}" span="{{.N}}"></colgroup>
     {{end}}
       <colgroup class="col-user"></colgroup>
       <colgroup class="col-time"></colgroup>
@@ -62,7 +62,7 @@
         <th>&nbsp;</th>
     {{end}}
     {{range $.Builders | builderSpans}}
-        <th {{if (unsupportedOS .OS)}}class="unsupported"{{end}} colspan="{{.N}}">{{.OS}}</th>
+        <th {{if .Unsupported}}class="unsupported"{{end}} colspan="{{.N}}">{{.OS}}</th>
     {{end}}
         <th></th>
         <th></th>
@@ -76,7 +76,7 @@
         <th>&nbsp;</th>
     {{end}}
     {{range $.Builders}}
-        <th class="result arch{{if (unsupportedOS (builderOS .))}} unsupported{{end}}" title="{{.}}">{{builderSubheading .}}</th>
+        <th class="result arch{{if (unsupported .)}} unsupported{{end}}" title="{{.}}">{{builderSubheading .}}</th>
     {{end}}
         <th></th>
         <th></th>
@@ -94,7 +94,7 @@
           <td class="hash"><a href="{{repoURL $.Dashboard.Name $h ""}}">{{shortHash $h}}</a></td>
         {{end}}
           {{range $.Builders}}
-            <td class="result{{if (unsupportedOS (builderOS .))}} unsupported{{end}}">
+            <td class="result{{if (unsupported .)}} unsupported{{end}}">
               {{with $c.Result . $h}}
                 {{if .OK}}
                   <span class="ok">ok</span>
@@ -146,7 +146,7 @@
       <colgroup class="col-package"></colgroup>
       <colgroup class="col-hash"></colgroup>
       {{range $.Builders | builderSpans}}
-        <colgroup class="col-result{{if (unsupportedOS .OS)}} unsupported{{end}}" span="{{.N}}"></colgroup>
+        <colgroup class="col-result{{if .Unsupported}} unsupported{{end}}" span="{{.N}}"></colgroup>
       {{end}}
       <colgroup class="col-user"></colgroup>
       <colgroup class="col-time"></colgroup>
@@ -158,7 +158,7 @@
         <th></th>
         <th></th>
         {{range $.Builders | builderSpans}}
-          <th {{if (unsupportedOS .OS)}}class="unsupported"{{end}} colspan="{{.N}}">{{.OS}}</th>
+          <th {{if .Unsupported}}class="unsupported"{{end}} colspan="{{.N}}">{{.OS}}</th>
         {{end}}
         <th></th>
         <th></th>
@@ -168,7 +168,7 @@
         <th></th>
         <th></th>
         {{range $.Builders}}
-          <th class="result arch{{if (unsupportedOS (builderOS .))}} unsupported{{end}}" title="{{.}}">{{builderSubheading .}}</th>
+          <th class="result arch{{if (unsupported .)}} unsupported{{end}}" title="{{.}}">{{builderSubheading .}}</th>
         {{end}}
         <th></th>
         <th></th>
@@ -182,7 +182,7 @@
           <a href="{{repoURL $.Dashboard.Name $h $pkg.Commit.PackagePath}}">{{shortHash $h}}</a>
         </td>
         {{range $.Builders}}
-          <td class="result{{if (unsupportedOS (builderOS .))}} unsupported{{end}}">
+          <td class="result{{if (unsupported .)}} unsupported{{end}}">
             {{with $pkg.Commit.Result . $goHash}}
               {{if .OK}}
                 <span class="ok">ok</span>