Windows python 2.7.13 pex 1.2.13 requires wheel==0.29.0

[adobeDan]

The latest wheel version on Windows (0.30.0), when run with Python 2.7.13 and pex 1.2.13, produces a build error:

  File "c:\cygwin64\home\dbrotsky\build27\lib\site-packages\pex\bin\pex.py", line 423, in _safe_link
    os.symlink(src, dst)
AttributeError: 'module' object has no attribute 'symlink'

The workaround is to build with wheel 0.29.0.

[adobeDan]

Turns out that pex requires wheel to be less than version 30. From the PEX source version.py:

WHEEL_REQUIREMENT = 'wheel>=0.26.0,<0.30.0'

So we need our makefile to have the same restriction.