Pillow does not get installed.

[garbas]

example requirements.txt to reproduce this

Flask-Holster>=0.3.4
Flask-Login>=0.2.7
Flask-SQLAlchemy
Flask-Uploads
Flask-WTF>=0.9.0
Flask>=0.10
Parsley
Pillow
PyRSS2Gen>=1.0
PyYAML
Unidecode
WTForms>=1.0.5
betterpath
python-dateutil
Twisted

[garbas]

i've fixed pillow in custom branch so that its setup.py will try to resolve paths using pkg-config
for now you can put https://github.com/garbas/Pillow/archive/pkg-config.tar.gz#egg=Pillow in your requirements.txt

[teh]

I don't think us constantly patching pillow is a great solution so I'd like to re-open this. I can think of a few solutions:

1. Upstream better pkg-config support (preferred)
2. Allow pypi2nix to override requirements.txt with a package from nixpkgs

What do you think?

[garbas]

in requirements.txt you can already point to custom sources of packages, this can serve as an intermediate solution, as I did above in a comment.

I submitted the PR and after few ping/pong comments it got merged
python-pillow/Pillow#2074

As you said, preferred option is always to fix it upstream.

[teh]

Ah cool, thanks! This should be in 4.0.0 so I'm not sure why things still aren't working. I'll investigate

[garbas]

@teh I have added a pillow example to pypi2nix f1d9e52 ... and if something breaks we will know. For now, I am only building for Linux it takes a bit too much effort to set this up for osx