-export mingw_include=f:/mingw/include
-export mingw_lib=f:/mingw/lib/
-export mingw_bin=f:/mingw/bin/
-
-export perl_dir=c:/ghc/ghc-5.04
-#export mingw_include=c:/ghc/ghc-5.02.2/include/mingw
+export mingw_include=$mingw_top/include
+export mingw_lib=$mingw_top/lib
+export mingw_bin=$mingw_top/bin