diff --git a/build.cake b/build.cake
index 1742f6b6..d94d45fd 100644
--- a/build.cake
+++ b/build.cake
@@ -544,7 +544,7 @@ Task ("externals-osx")
     .Does (() =>  
 {
     var buildArch = new Action<string, string> ((arch, skiaArch) => {
-        RunGyp ("skia_arch_type='" + skiaArch + "' skia_gpu=1", "ninja,xcode");
+        RunGyp ("skia_arch_type='" + skiaArch + "' skia_gpu=1 skia_osx_deployment_target=10.7", "ninja,xcode");
         
         XCodeBuild (new XCodeBuildSettings {
             Project = "native-builds/libSkiaSharp_osx/libSkiaSharp.xcodeproj",
@@ -596,7 +596,7 @@ Task ("externals-ios")
     // set up the gyp environment variables
     AppendEnvironmentVariable ("PATH", DEPOT_PATH.FullPath);
     
-    RunGyp ("skia_os='ios' skia_arch_type='arm' armv7=1 arm_neon=0 skia_gpu=1", "ninja,xcode");
+    RunGyp ("skia_os='ios' skia_arch_type='arm' armv7=1 arm_neon=0 skia_gpu=1 ios_sdk_version=8.0", "ninja,xcode");
     
     buildArch ("iphonesimulator", "i386");
     buildArch ("iphonesimulator", "x86_64");
@@ -625,7 +625,7 @@ Task ("externals-tvos")
     var convertIOSToTVOS = new Action (() => {
         var glob = "./skia/out/gyp/*.xcodeproj/project.pbxproj";
         ReplaceTextInFiles (glob, "SDKROOT = iphoneos;", "SDKROOT = appletvos;");
-        ReplaceTextInFiles (glob, "IPHONEOS_DEPLOYMENT_TARGET = 9.2;", "TVOS_DEPLOYMENT_TARGET = 9.1;");
+        ReplaceTextInFiles (glob, "IPHONEOS_DEPLOYMENT_TARGET", "TVOS_DEPLOYMENT_TARGET");
         ReplaceTextInFiles (glob, "TARGETED_DEVICE_FAMILY = \"1,2\";", "TARGETED_DEVICE_FAMILY = 3;");
         ReplaceTextInFiles (glob, "\"CODE_SIGN_IDENTITY[sdk=iphoneos*]\" = \"iPhone Developer\";", "");
     });
@@ -647,7 +647,7 @@ Task ("externals-tvos")
     // set up the gyp environment variables
     AppendEnvironmentVariable ("PATH", DEPOT_PATH.FullPath);
     
-    RunGyp ("skia_os='ios' skia_arch_type='arm' armv7=1 arm_neon=0 skia_gpu=1", "ninja,xcode");
+    RunGyp ("skia_os='ios' skia_arch_type='arm' armv7=1 arm_neon=0 skia_gpu=1 ios_sdk_version=9.0", "ninja,xcode");
     convertIOSToTVOS();
     
     buildArch ("appletvsimulator", "x86_64");
diff --git a/native-builds/libSkiaSharp_ios/libSkiaSharp.xcodeproj/project.pbxproj b/native-builds/libSkiaSharp_ios/libSkiaSharp.xcodeproj/project.pbxproj
index 9ab01175..cb5ef988 100644
--- a/native-builds/libSkiaSharp_ios/libSkiaSharp.xcodeproj/project.pbxproj
+++ b/native-builds/libSkiaSharp_ios/libSkiaSharp.xcodeproj/project.pbxproj
@@ -181,6 +181,13 @@
 			remoteGlobalIDString = 58D65910B589341DD97198F8;
 			remoteInfo = libetc1;
 		};
+		342DF2121D7BBBB00078246B /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 21FD2CFA1C015ED60023CFAE /* opts.xcodeproj */;
+			proxyType = 2;
+			remoteGlobalIDString = C7E8882721F7612ABD656185;
+			remoteInfo = opts_crc32;
+		};
 		3454C3161D011F3F008A8A1A /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 3454C2F01D011F3F008A8A1A /* pdf.xcodeproj */;
@@ -629,13 +636,6 @@
 			remoteGlobalIDString = 2DCF672F726600FFFAE0A889;
 			remoteInfo = piex;
 		};
-		34F197931C61883C00B41B54 /* PBXContainerItemProxy */ = {
-			isa = PBXContainerItemProxy;
-			containerPortal = 34F197881C61883C00B41B54 /* libjpeg-turbo.xcodeproj */;
-			proxyType = 2;
-			remoteGlobalIDString = 6C7F36B7E05C9CAE89B0BAC9;
-			remoteInfo = "yasm-win";
-		};
 		34F197951C61883C00B41B54 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 34F197881C61883C00B41B54 /* libjpeg-turbo.xcodeproj */;
@@ -905,6 +905,7 @@
 			isa = PBXGroup;
 			children = (
 				21FD2D211C015ED70023CFAE /* libskia_opts.a */,
+				342DF2131D7BBBB00078246B /* libskia_opts_crc32.a */,
 				21FD2D231C015ED70023CFAE /* libskia_opts_ssse3.a */,
 				21FD2D251C015ED70023CFAE /* libskia_opts_sse41.a */,
 				21FD2D271C015ED70023CFAE /* libskia_opts_sse42.a */,
@@ -1021,7 +1022,6 @@
 		34F197891C61883C00B41B54 /* Products */ = {
 			isa = PBXGroup;
 			children = (
-				34F197941C61883C00B41B54 /* yasm-win */,
 				34F197961C61883C00B41B54 /* libjpeg-turbo.a */,
 			);
 			name = Products;
@@ -1380,6 +1380,13 @@
 			remoteRef = 21FD2D7C1C0163140023CFAE /* PBXContainerItemProxy */;
 			sourceTree = BUILT_PRODUCTS_DIR;
 		};
+		342DF2131D7BBBB00078246B /* libskia_opts_crc32.a */ = {
+			isa = PBXReferenceProxy;
+			fileType = archive.ar;
+			path = libskia_opts_crc32.a;
+			remoteRef = 342DF2121D7BBBB00078246B /* PBXContainerItemProxy */;
+			sourceTree = BUILT_PRODUCTS_DIR;
+		};
 		3454C3171D011F3F008A8A1A /* libnopdf.a */ = {
 			isa = PBXReferenceProxy;
 			fileType = archive.ar;
@@ -1436,13 +1443,6 @@
 			remoteRef = 34BEEE671D1AAC73002A1E48 /* PBXContainerItemProxy */;
 			sourceTree = BUILT_PRODUCTS_DIR;
 		};
-		34F197941C61883C00B41B54 /* yasm-win */ = {
-			isa = PBXReferenceProxy;
-			fileType = "compiled.mach-o.executable";
-			path = "yasm-win";
-			remoteRef = 34F197931C61883C00B41B54 /* PBXContainerItemProxy */;
-			sourceTree = BUILT_PRODUCTS_DIR;
-		};
 		34F197961C61883C00B41B54 /* libjpeg-turbo.a */ = {
 			isa = PBXReferenceProxy;
 			fileType = archive.ar;
@@ -1855,7 +1855,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_LDFLAGS = "-all_load";
@@ -1910,7 +1910,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				OTHER_LDFLAGS = "-all_load";
 				SDKROOT = iphoneos;
diff --git a/native-builds/libSkiaSharp_osx/libSkiaSharp.xcodeproj/project.pbxproj b/native-builds/libSkiaSharp_osx/libSkiaSharp.xcodeproj/project.pbxproj
index a1378bb4..dea52122 100644
--- a/native-builds/libSkiaSharp_osx/libSkiaSharp.xcodeproj/project.pbxproj
+++ b/native-builds/libSkiaSharp_osx/libSkiaSharp.xcodeproj/project.pbxproj
@@ -1637,6 +1637,7 @@
 					../../skia/include/utils,
 					../../skia/include/config,
 				);
+				MACOSX_DEPLOYMENT_TARGET = 10.7;
 				OTHER_CPLUSPLUSFLAGS = (
 					"-std=c++0x",
 					"-stdlib=libc++",
@@ -1663,6 +1664,7 @@
 					../../skia/include/utils,
 					../../skia/include/config,
 				);
+				MACOSX_DEPLOYMENT_TARGET = 10.7;
 				OTHER_CPLUSPLUSFLAGS = (
 					"-std=c++0x",
 					"-stdlib=libc++",
diff --git a/native-builds/libSkiaSharp_tvos/libSkiaSharp.xcodeproj/project.pbxproj b/native-builds/libSkiaSharp_tvos/libSkiaSharp.xcodeproj/project.pbxproj
index 17d1f14e..023b481b 100644
--- a/native-builds/libSkiaSharp_tvos/libSkiaSharp.xcodeproj/project.pbxproj
+++ b/native-builds/libSkiaSharp_tvos/libSkiaSharp.xcodeproj/project.pbxproj
@@ -1948,6 +1948,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "xamarin.libskia-ios";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
+				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Debug;
 		};
@@ -1982,6 +1983,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "xamarin.libskia-ios";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
+				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Release;
 		};