I'm trying to build Demos as suggested in USAGE.txt and got error from linker: cheese.obj : error LNK2019: unresolved external symbol _find_cheeses referenced in function ___pyx_pf_6cheese_find C:\work\Python\Cython\Demos\cheese.pyd : fatal error LNK1120: 1 unresolved externals The same problem with released 0.19.1 and latest version from github. My system is Windows 7 64 bit with Python 2.7.5 32-bit installed on it.