--- a/mingwmake.bat	Fri Jan 11 10:58:20 2013 +0100
+++ b/mingwmake.bat	Fri Jan 11 15:32:51 2013 +0100
@@ -3,4 +3,6 @@
 @REM type mingwmake, and wait...
 @REM do not edit - automatically generated from ProjectDefinition
 @REM -------
-make.exe -N -f bc.mak USEMINGW=1 %1 %2
+
+@call ..\rules\find_mingw.bat
+make.exe -N -f bc.mak -DUSEMINGW64=1 %*