anchor.diff:      sha256 = "0cmagfdaaml1pxhnxggifpb47z5g1p231qywnvnqpd3dm93382w1";
     };
   
  -  propagatedBuildInputs = with python36.pkgs; [
  +  propagatedBuildInputs = with python3.pkgs; [
       click requests filetype pyparsing configparser
       arxiv2bib pyyaml chardet beautifulsoup4 prompt_toolkit
       bibtexparser python-slugify pyparser pylibgen
  
positive.code: { lib, fetchFromGitHub, fetchpatch
  , python36, xdg_utils
  }:
  
  python36.pkgs.buildPythonApplication rec {
    pname = "papis";
    version = "0.7.5";
  
  
negative.code:     install -Dt "$out/etc/bash_completion.d" scripts/shell_completion/build/bash/papis
    '';
  
    checkInputs = (with python3.pkgs; [
      pytest
    ]) ++ [
      xdg_utils
  