--- a/tools/build_windows.bat	Thu May 30 21:08:13 2013 +0900
+++ b/tools/build_windows.bat	Fri May 31 14:51:08 2013 -0400
@@ -40,7 +40,7 @@
 
 echo Running cmake...
 set ERRORLEVEL=
-cmake . -G "MinGW Makefiles" -DCMAKE_PREFIX_PATH="%CD%\misc\winutils\" -DPNG_LIBRARY="%CD%\misc\winutils\bin\libpng13.dll" -DCMAKE_BUILD_TYPE="%BUILD_TYPE%"
+cmake . -G "MinGW Makefiles" -DPNG_LIBRARY="%CD%\misc\winutils\bin\libpng13.dll" -DCMAKE_BUILD_TYPE="%BUILD_TYPE%" -DCMAKE_PREFIX_PATH="%CD%\misc\winutils\" ::prefix should be last
 
 if %ERRORLEVEL% NEQ 0 goto exitpoint