pypi2nix seems to be broken

[nlewo]

Issue description

./result/bin/pypi2nix -h
Traceback (most recent call last):
  File "/nix/store/rp9hdj02sibvvdryhpv7qz01yzah260n-pypi2nix-1.6.0/bin/.pypi2nix-wrapped", line 2, in <module>
    import pypi2nix.cli
  File "/nix/store/rp9hdj02sibvvdryhpv7qz01yzah260n-pypi2nix-1.6.0/pkgs/pypi2nix/cli.py", line 9, in <module>
    import pypi2nix.stage2
  File "/nix/store/rp9hdj02sibvvdryhpv7qz01yzah260n-pypi2nix-1.6.0/pkgs/pypi2nix/stage2.py", line 9, in <module>
    import pkg_resources
ImportError: No module named 'pkg_resources'

Steps to reproduce

On master,

nix-build ./ -A  pypi2nix
./result/bin/pypi2nix -h

Technical details

• System: (NixOS: nixos-version, Ubuntu/Fedora: lsb_release -a, ...)
• Nix version: (run nix-env --version)
• Nixpkgs version: (run nix-instantiate --eval '<nixpkgs>' -A lib.nixpkgsVersion)
  15.09.706.45128de

[Mic92]

cc @garbas

[garbas]

this should be fixed in current master of pypi2nix, a release is pending. I will do the release once I'm out of the hospital (2-4 days)