I was doing the final checks for a new release of statsmodels and ran into a problem with install_clib I do "setup.py install" from the source or sdist of scikits.statsmodels and the install breaks with this message at the end running install_clib No module named msvccompiler in numpy.distutils; trying from distutils error: Python was built with Visual Studio 2003; extensions must be built with a compiler than can generate compatible binaries. Visual Studio 2003 was not found on this system. If you have Cygwin installed, you can try compiling with MingW32, by passing "-c mingw32" to setup.py. statsmodels is pure python and there are no extensions to compile, the setup.py file is here http://bazaar.launchpad.net/~scipystats/statsmodels/trunk/annotate/head%3A/s... we don't have any setup.py on lower levels setup.py install worked and works without problems with numpy 1.3.0 same story with "easy_install scikits.statsmodels" directly from pypi, works for numpy 1.3.0, same error as above with numpy 1.4.0 Any ideas? Are there some configuration settings that I need to change to install with numpy 1.4? "setup.py build install" works, but does it mean it requires a c compiler for a pure python package when using numpy distutils? Josef