Ergonomic, hermetic, user-friendly software build system for Python, Go, Java, Kotlin, Protobuf, Scala, Shell. Pants lets you fearlessly scale up your codebase!

Pants

not getting far buliding a pex from master today:
```
  File "/Users/zundel/.pex/install/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl.b424c2c97d86f72f5eccca6a7b0874398c0877b8/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl/cffi/api.py", line 56, in __init__
    import _cffi_backend as backend

Exception message: dlopen(/Users/zundel/.pex/install/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl.b424c2c97d86f72f5eccca6a7b0874398c0877b8/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl/_cffi_backend.so, 2): Symbol not found: _PyUnicodeUCS4_AsASCIIString
  Referenced from: /Users/zundel/.pex/install/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl.b424c2c97d86f72f5eccca6a7b0874398c0877b8/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl/_cffi_backend.so
  Expected in: flat namespace
 in /Users/zundel/.pex/install/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl.b424c2c97d86f72f5eccca6a7b0874398c0877b8/cffi-1.7.0-cp27-cp27mu-macosx_10_10_x86_64.whl/_cffi_backend.so

```
This libcffi dep has always been a thorn in my side. Usually it breaks on Linux, I'm not sure why its breaking on mac today.