requirements.nix

# generated using pypi2nix tool (version: 1.8.1)
# See more at: https://github.com/garbas/pypi2nix
#
# COMMAND:
#   pypi2nix -V 2.7
#

{ pkgs ? import <nixpkgs> {}
}:

let

  inherit (pkgs) makeWrapper;
  inherit (pkgs.stdenv.lib) fix' extends inNixShell;

  pythonPackages =
  import "${toString pkgs.path}/pkgs/top-level/python-packages.nix" {
    inherit pkgs;
    inherit (pkgs) stdenv;
    python = pkgs.python27Full;
    # patching pip so it does not try to remove files when running nix-shell
    overrides =
      self: super: {
        bootstrapped-pip = super.bootstrapped-pip.overrideDerivation (old: {
          patchPhase = old.patchPhase + ''
            sed -i               -e "s|paths_to_remove.remove(auto_confirm)|#paths_to_remove.remove(auto_confirm)|"                -e "s|self.uninstalled = paths_to_remove|#self.uninstalled = paths_to_remove|"                  $out/${pkgs.python35.sitePackages}/pip/req/req_install.py
          '';
        });
      };
  };

  commonBuildInputs = [];
  commonDoCheck = false;

  withPackages = pkgs':
    let
      pkgs = builtins.removeAttrs pkgs' ["__unfix__"];
      interpreter = pythonPackages.buildPythonPackage {
        name = "python27Full-interpreter";
        buildInputs = [ makeWrapper ] ++ (builtins.attrValues pkgs);
        buildCommand = ''
          mkdir -p $out/bin
          ln -s ${pythonPackages.python.interpreter}               $out/bin/${pythonPackages.python.executable}
          for dep in ${builtins.concatStringsSep " "               (builtins.attrValues pkgs)}; do
            if [ -d "$dep/bin" ]; then
              for prog in "$dep/bin/"*; do
                if [ -f $prog ]; then
                  ln -s $prog $out/bin/`basename $prog`
                fi
              done
            fi
          done
          for prog in "$out/bin/"*; do
            wrapProgram "$prog" --prefix PYTHONPATH : "$PYTHONPATH"
          done
          pushd $out/bin
          ln -s ${pythonPackages.python.executable} python
          ln -s ${pythonPackages.python.executable}               python2
          popd
        '';
        passthru.interpreter = pythonPackages.python;
      };
    in {
      __old = pythonPackages;
      inherit interpreter;
      mkDerivation = pythonPackages.buildPythonPackage;
      packages = pkgs;
      overrideDerivation = drv: f:
        pythonPackages.buildPythonPackage (drv.drvAttrs // f drv.drvAttrs //                                            { meta = drv.meta; });
      withPackages = pkgs'':
        withPackages (pkgs // pkgs'');
    };

  python = withPackages {};

  generated = self: {

  };
  localOverridesFile = ./requirements_override.nix;
  overrides = import localOverridesFile { inherit pkgs python; };
  commonOverrides = [

  ];
  allOverrides =
    (if (builtins.pathExists localOverridesFile)
     then [overrides] else [] ) ++ commonOverrides;

in python.withPackages
   (fix' (pkgs.lib.fold
            extends
            generated
            allOverrides
         )
   )

shell.nix

{ pkgs ? import <nixpkgs> {} }:
let
  # inspired by https://github.com/nix-community/pypi2nix#id17
  python = import ./requirements.nix { inherit pkgs; };
in
  python.interpreter