Is there an easy way to ask pants to build a pex with no support for extension modules? Many third party libraries (e.g., https://github.com/pallets/markupsafe/blob/master/setup.py#L110-L123) only compile in such modules to produce speedups, and have a fallback option in nice, portable pure python. (This module is a good example of one that does not offer a bdist on PyP -- specifying

platforms=

in the target doesn't always work.) We're using pexes in a place where it would be super convenient to not have to worry about the potential portability issues.