diff --git a/Sources/OpenSubdiv/osd/GLComputeEvaluator.cpp b/Sources/OpenSubdiv/osd/GLComputeEvaluator.cpp
index d05c3f26..b06ec52b 100644
--- a/Sources/OpenSubdiv/osd/GLComputeEvaluator.cpp
+++ b/Sources/OpenSubdiv/osd/GLComputeEvaluator.cpp
@@ -24,12 +24,14 @@
 
 #include "glLoader.h"
 
-#if __has_include("GPUShaders/GPUShaders-Swift.h")
+#if 0
+# if __has_include("GPUShaders/GPUShaders-Swift.h")
   #include "GPUShaders/GPUShaders-Swift.h"
-#else
+# else
   #define GPU_SHADERS_INC <GPU_SHADERS_SWIFT_OSD_H>
   #include GPU_SHADERS_INC
-#endif
+# endif
+#endif // 0
 
 #include "OpenSubdiv/OSDSurfaceGLComputeEvaluator.h"
 #include "OpenSubdiv/OSDSurfaceGLSLPatchShaderSource.h"
@@ -42,13 +44,12 @@
 #include <sstream>
 #include <vector>
 
-#include GPU_SHADERS_INC
-
 namespace OpenSubdiv {
 namespace OPENSUBDIV_VERSION {
 
 namespace Osd {
 
+#if 0
 /* and here, we use our Swift implementation right out of the box, in cxx. magic. */
 static GPUShaders::GPUShaders glCompShaders = GPUShaders::GPUShaders::init();
 static swift::String glCompCode = glCompShaders.setupMetal();
@@ -61,6 +62,11 @@ static const char *getShaderCode() {
   ss.str().copy(source, bufSize);
   return &source[bufSize];
 }
+#else // 0
+static const char *getShaderCode() {
+  return "";
+}
+#endif
 
 static const char *shaderSource = getShaderCode();
 
diff --git a/Sources/OpenSubdiv/osd/GLSLPatchShaderSource.cpp b/Sources/OpenSubdiv/osd/GLSLPatchShaderSource.cpp
index 3bcd58e9..9758fbb7 100644
--- a/Sources/OpenSubdiv/osd/GLSLPatchShaderSource.cpp
+++ b/Sources/OpenSubdiv/osd/GLSLPatchShaderSource.cpp
@@ -22,24 +22,25 @@
 //   language governing permissions and limitations under the Apache License.
 //
 
-#if __has_include("GPUShaders/GPUShaders-Swift.h")
+#if 0
+# if __has_include("GPUShaders/GPUShaders-Swift.h")
   #include "GPUShaders/GPUShaders-Swift.h"
-#else
+# else
   #define GPU_SHADERS_INC <GPU_SHADERS_SWIFT_OSD_H>
   #include GPU_SHADERS_INC
-#endif
+# endif
+#endif // 0
 
 #include "OpenSubdiv/OSDSurfaceGLSLPatchShaderSource.h"
 #include <sstream>
 #include <string>
 
-#include GPU_SHADERS_INC
-
 namespace OpenSubdiv {
 namespace OPENSUBDIV_VERSION {
 
 namespace Osd {
 
+#if 0
 /* and here, we use our Swift implementation right out of the box, in cxx. magic. */
 static GPUShaders::GPUShaders glslShaders = GPUShaders::GPUShaders::init();
 static swift::String glslCode = glslShaders.setupMetal();
@@ -52,6 +53,11 @@ static const char *getShaderCode() {
   ss.str().copy(source, bufSize);
   return &source[bufSize];
 }
+#else // 0
+static const char *getShaderCode() {
+  return "";
+}
+#endif
 
 static const char *commonShaderSource = getShaderCode();
 static const char *commonTessShaderSource = getShaderCode();
diff --git a/Sources/OpenSubdiv/osd/GLXFBEvaluator.cpp b/Sources/OpenSubdiv/osd/GLXFBEvaluator.cpp
index 794993b9..302b890a 100644
--- a/Sources/OpenSubdiv/osd/GLXFBEvaluator.cpp
+++ b/Sources/OpenSubdiv/osd/GLXFBEvaluator.cpp
@@ -24,12 +24,14 @@
 
 #include "glLoader.h"
 
-#if __has_include("GPUShaders/GPUShaders-Swift.h")
+#if 0
+# if __has_include("GPUShaders/GPUShaders-Swift.h")
   #include "GPUShaders/GPUShaders-Swift.h"
-#else
+# else
   #define GPU_SHADERS_INC <GPU_SHADERS_SWIFT_OSD_H>
   #include GPU_SHADERS_INC
-#endif
+# endif
+#endif // 0
 
 #include "OpenSubdiv/OSDSurfaceGLXFBEvaluator.h"
 #include "OpenSubdiv/OSDSurfaceGLSLPatchShaderSource.h"
@@ -42,8 +44,6 @@
 #include "OpenSubdiv/OSDAdaptiveError.h"
 #include "OpenSubdiv/OSDAdaptiveStencilTable.h"
 
-#include GPU_SHADERS_INC
-
 #if _MSC_VER
 #define snprintf _snprintf
 #endif
@@ -53,6 +53,7 @@ namespace OPENSUBDIV_VERSION {
 
 namespace Osd {
 
+#if 0
 /* and here, we use our Swift implementation right out of the box, in cxx. magic. */
 static GPUShaders::GPUShaders glXShaders = GPUShaders::GPUShaders::init();
 static swift::String glXCode = glXShaders.setupMetal();
@@ -65,6 +66,11 @@ static const char *getShaderCode() {
   ss.str().copy(source, bufSize);
   return &source[bufSize];
 }
+#else // 0
+static const char *getShaderCode() {
+  return "";
+}
+#endif
 
 static const char *shaderSource = getShaderCode();
 
diff --git a/Sources/OpenSubdiv/osd/MTLPatchShaderSource.mm b/Sources/OpenSubdiv/osd/MTLPatchShaderSource.mm
index d8ae50c0..88ff3058 100644
--- a/Sources/OpenSubdiv/osd/MTLPatchShaderSource.mm
+++ b/Sources/OpenSubdiv/osd/MTLPatchShaderSource.mm
@@ -22,12 +22,14 @@
 //   language governing permissions and limitations under the Apache License.
 //
 
-#if __has_include("GPUShaders/GPUShaders-Swift.h")
+#if 0
+# if __has_include("GPUShaders/GPUShaders-Swift.h")
   #import "GPUShaders/GPUShaders-Swift.h"
-#else
+# else
   #define GPU_SHADERS_INC <GPU_SHADERS_SWIFT_OSD_H>
   #import GPU_SHADERS_INC
-#endif
+# endif
+#endif // 0
 
 #include "OpenSubdiv/OSDAdaptiveError.h"
 #include "OpenSubdiv/OSDSurfaceMTLPatchShaderSource.h"
@@ -41,6 +43,7 @@
 
 namespace Osd {
 
+#if 0
 /* and here, we use our Swift implementation right out of the box, in cxx. magic. */
 static GPUShaders::GPUShaders mtlShaders = GPUShaders::GPUShaders::init();
 static swift::String shaderCode = mtlShaders.setupMetal();
@@ -55,6 +58,18 @@
 static std::string gregoryShaderSource([shaderCode UTF8String]);
 static std::string gregoryBasisShaderSource([shaderCode UTF8String]);
 static std::string gregoryTriangleShaderSource([shaderCode UTF8String]);
+#else // 0
+static std::string commonShaderSource("");
+static std::string commonTessShaderSource("");
+static std::string patchLegacyShaderSource("");
+static std::string patchBasisTypesShaderSource("");
+static std::string patchBasisShaderSource("");
+static std::string bsplineShaderSource("");
+static std::string boxSplineTriangleShaderSource("");
+static std::string gregoryShaderSource("");
+static std::string gregoryBasisShaderSource("");
+static std::string gregoryTriangleShaderSource("");
+#endif
 
 static std::string GetPatchTypeDefine(
     Far::PatchDescriptor::Type type,
diff --git a/Sources/OpenSubdiv/osd/hlslPatchShaderSource.cpp b/Sources/OpenSubdiv/osd/hlslPatchShaderSource.cpp
index 2a2d2565..3c77222f 100644
--- a/Sources/OpenSubdiv/osd/hlslPatchShaderSource.cpp
+++ b/Sources/OpenSubdiv/osd/hlslPatchShaderSource.cpp
@@ -22,12 +22,14 @@
 //   language governing permissions and limitations under the Apache License.
 //
 
-#if __has_include("GPUShaders/GPUShaders-Swift.h")
+#if 0
+# if __has_include("GPUShaders/GPUShaders-Swift.h")
   #include "GPUShaders/GPUShaders-Swift.h"
-#else
+# else
   #define GPU_SHADERS_INC <GPU_SHADERS_SWIFT_OSD_H>
   #include GPU_SHADERS_INC
-#endif
+# endif
+#endif // 0
 
 #include "OpenSubdiv/OSDAdaptiveError.h"
 #include "OpenSubdiv/OSDSurfaceHLSLPatchShaderSource.h"
@@ -40,6 +42,7 @@ namespace OPENSUBDIV_VERSION {
 
 namespace Osd {
 
+#if 0
 /* and here, we use our Swift implementation right out of the box, in cxx. magic. */
 static GPUShaders::GPUShaders hlslShaders = GPUShaders::GPUShaders::init();
 static swift::String hlslCode = hlslShaders.setupMetal();
@@ -52,7 +55,6 @@ static const char *getShaderCode() {
   ss.str().copy(source, bufSize);
   return &source[bufSize];
 }
-
 static const char *commonShaderSource = getShaderCode();
 static const char *commonTessShaderSource = getShaderCode();
 static const char *patchLegacyShaderSource = getShaderCode();
@@ -63,6 +65,18 @@ static const char *bsplineShaderSource = getShaderCode();
 static const char *gregoryShaderSource = getShaderCode();
 static const char *gregoryBasisShaderSource = getShaderCode();
 static const char *gregoryTriangleShaderSource = getShaderCode();
+#else // 0
+static const char *commonShaderSource = "";
+static const char *commonTessShaderSource = "";
+static const char *patchLegacyShaderSource = "";
+static const char *patchBasisTypesShaderSource = "";
+static const char *patchBasisShaderSource = "";
+static const char *boxSplineTriangleShaderSource = "";
+static const char *bsplineShaderSource = "";
+static const char *gregoryShaderSource = "";
+static const char *gregoryBasisShaderSource = "";
+static const char *gregoryTriangleShaderSource = "";
+#endif // 0
 
 /*static*/
 std::string HLSLPatchShaderSource::GetPatchDrawingShaderSource() {