anchor.diff:      ln -sf requirements.in requirements.txt
   
       # remove dependency constraints
  -    sed 's/==\([0-9]\.\?\)\+//' -i requirements.txt
  +    sed 's/[>=]=.*//' -i requirements.txt
   
       # "zxcvbn-python" was renamed to "zxcvbn", and we don't have the former in
       # nixpkgs. See: https://github.com/NixOS/nixpkgs/issues/62110
  
positive.code: { lib
  , fetchFromGitHub
  , python3
  }:
  
  let
    py = python3.override {
      packageOverrides = self: super: {
  
        jsonschema = super.jsonschema.overridePythonAttrs (oldAttrs: rec {
          version = "3.2.0";
  
          src = super.fetchPypi {
            inherit (oldAttrs) pname;
            inherit version;
            hash = "sha256-yKhbKNN3zHc35G4tnytPRO48Dh3qxr9G3e/HGH0weXo=";
          };
  
          SETUPTOOLS_SCM_PRETEND_VERSION = version;
  
          doCheck = false;
        });
      };
    };
  in
  with py.pkgs;
  
  buildPythonApplication rec {
    pname = "flexget";
    version = "3.2.18";
    format = "setuptools";
  
    # Fetch from GitHub in order to use `requirements.in`
    src = fetchFromGitHub {
      owner = "flexget";
      repo = "flexget";
      rev = "v${version}";
      sha256 = "sha256-68tD7I7MI/Cp94tp6c4lQx+8xwRnJTKTF/3SWz4Ddgg=";
    };
  
    postPatch = ''
  
negative.code:   # ~400 failures
    doCheck = false;
  
    propagatedBuildInputs = with python3Packages; [
      # See https://github.com/Flexget/Flexget/blob/master/requirements.in
      APScheduler
      beautifulsoup4
  