--- a/mingwmake.bat	Tue Mar 12 10:31:15 2013 +0000
+++ b/mingwmake.bat	Fri Mar 15 14:06:47 2013 +0000
@@ -8,7 +8,9 @@
 @FOR /F "tokens=*" %%i in ('hg root') do SET HGROOT=%%i
 @IF "%HGROOT%" NEQ "" SET DEFINES=%DEFINES% "-DHGROOT=%HGROOT%"
 
-@call ..\rules\find_mingw.bat
+@pushd ..\rules
+@call find_mingw.bat
+@popd
 make.exe -N -f bc.mak %USEMINGW_ARG% %*