delocate-wheel can't add dylibs and so files

[polychordlondon]

I'm trying to build a wheel for MacOS users, the source code of this wheel can be found here:
https://github.com/PolyChord/PolyChordLite/tree/setup_pip

I'm facing the same problem than issue#15:

➜  polychordlite git:(setup_pip) delocate-listdeps --all --depending dist/pypolychord_nompi-1.15.1-cp27-cp27m-macosx_10_12_x86_64.whl                                                                        
/Users/polychord/Desktop/polychordlite/pypolychord/lib/libchord.so:
    _pypolychord.so
/usr/lib/libSystem.B.dylib:
    _pypolychord.so
/usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libgcc_s.1.dylib:
    _pypolychord.so
/usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libgfortran.5.dylib:
    _pypolychord.so
/usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libstdc++.6.dylib:
    _pypolychord.so

➜  polychordlite git:(setup_pip) delocate-wheel  -w dist/fixed -v dist/pypolychord_nompi-1.15.1-cp27-cp27m-macosx_10_12_x86_64.whl                                                                           
Fixing: dist/pypolychord_nompi-1.15.1-cp27-cp27m-macosx_10_12_x86_64.whl

Nothing is added to the fixed wheel.

But I think that the architecture is fine (architecture of the wheel):

_pypolychord.so
pypolychord
    __init__.py
    output.py
    priors.py
    settings.py
pypolychord_nompi-1.15.1.dist-info
    ...

The wheels can be built on linux with auditwheel.

Python 2.7 - delocate 0.7.4 - MacOS 10.12.6 (VM)

[zhreshold]

+1, same behavior here, with -v it shows Fixing: dist/xxx.whl but nothing happens