2cwT.nix

let
  pkgs = import <nixpkgs> {};
  python = pkgs.python35;

in

pkgs.runCommand "spanky-deps" {
  src = builtins.toFile "requirements.txt" ''
    bs4
    pathtools
  '';

  buildInputs = with pkgs; [
    python
    python.pkgs.setuptools
    python.pkgs.pip
  ];
  outputHash = "0000000000000000000000000000000000000000000000000000";
  outputHashAlgo = "sha256";
  outputHashMode = "recursive";
} ''
    SOURCE_DATE_EPOCH=$(date +%s)

    python3 -m pip install --disable-pip-version-check --no-warn-script-location --no-cache-dir --prefix $out -r $src
    grep -r --color $out $out
  ''