scons: Some pipe drivers are not portable for MSVC
diff --git a/src/gallium/SConscript b/src/gallium/SConscript
index 76f9ffb..1b41c39 100644
--- a/src/gallium/SConscript
+++ b/src/gallium/SConscript
@@ -14,16 +14,21 @@
     'drivers/failover/SConscript', 
     'drivers/galahad/SConscript',
     'drivers/i915/SConscript', 
-    'drivers/i965/SConscript', 
     'drivers/identity/SConscript', 
     'drivers/llvmpipe/SConscript', 
     'drivers/rbug/SConscript',
-    'drivers/r300/SConscript', 
     'drivers/softpipe/SConscript',
     'drivers/svga/SConscript', 
     'drivers/trace/SConscript', 
 ])
 
+if not env['msvc']:
+    # These drivers do not build on MSVC compilers
+    SConscript([
+        'drivers/i965/SConscript',
+        'drivers/r300/SConscript',
+    ])
+
 if env['dri']:
     # These drivers depend on drm headers
     SConscript([