--- a/mingwmake.bat	Fri Feb 01 16:11:48 2013 +0100
+++ b/mingwmake.bat	Fri Feb 01 16:11:53 2013 +0100
@@ -4,7 +4,7 @@
 @REM do not edit - automatically generated from ProjectDefinition
 @REM -------
 
-@call $(TOP)\rules\find_mingw.bat
+@call ..\rules\find_mingw.bat
 make.exe -N -f bc.mak -DUSEMINGW64=1 %*