Problem calling rake from Cygwin

I can't call my mingw installed (from rubyinstaller) rake and gem from cygwin. See the output below:

sh-3.2$ ruby -v
ruby 1.8.7 (2010-01-10 patchlevel 249) [i386-mingw32]
sh-3.2$ gem --version
C:\Ruby\bin\ruby.exe: No such file or directory -- /cygdrive/c/Ruby/bin/gem (LoadError)
sh-3.2$ rake --version
C:\Ruby\bin\ruby.exe: No such file or directory -- /cygdrive/c/Ruby/bin/rake (LoadError)


The only help I have been able to find is this comment . Which states that I should use rake.bat and gem.bat instead.

sh-3.2$ rake.bat --version
rake, version 0.8.7
sh-3.2$ gem.bat --version
1.3.5

:-( This makes it a bit complicated to call rake from a makefile.