--- a/mingwmake.bat	Wed Apr 03 20:00:43 2013 +0200
+++ b/mingwmake.bat	Wed Apr 03 20:00:46 2013 +0200
@@ -4,7 +4,9 @@
 @REM do not edit - automatically generated from ProjectDefinition
 @REM -------
 
-@call ..\rules\find_mingw.bat
+@pushd ..\rules
+@call find_mingw.bat
+@popd
 make.exe -N -f bc.mak %USEMINGW_ARG% %*