During the build of pyFFMpeg.py etc under CygWin/msys following error occurs File "F:\Python25\lib\distutils\version.py", line 107, in parse raise ValueError, "invalid version number '%s'" % vstring ValueError: invalid version number '2.18.50.20080109' According to the forums this is some sort of bug inside distutils... One recommendations is to use version 1.37. instead of current 1.38 cause that uses unixcompiler.py instead of cygwincompiler.py,... how does one to this?