anchor.diff:      homepage = "https://github.com/pimutils/todoman";
       description = "Standards-based task manager based on iCalendar";
       longDescription = ''
  -      Todoman is a simple, standards-based, cli todo (aka: task) manager. Todos
  -      are stored into icalendar files, which means you can sync them via CalDAV
  +      Todoman is a simple, standards-based, cli todo (aka task) manager. Todos
  +      are stored into iCalendar files, which means you can sync them via CalDAV
         using, for example, vdirsyncer.
   
         Todos are read from individual ics files from the configured directory.
  -      This matches the vdir specification.  There’s support for the most common TODO
  +      This matches the vdir specification. There is support for the most common TODO
         features for now (summary, description, location, due date and priority) for
  -      now.  Runs on any Unix-like OS. It’s been tested on GNU/Linux, BSD and macOS.
  +      now.
         Unsupported fields may not be shown but are never deleted or altered.
  -
  -      Todoman is part of the pimutils project
       '';
       changelog = "https://github.com/pimutils/todoman/raw/v${version}/CHANGELOG.rst";
       license = licenses.isc;
  
positive.code:     "test_missing_cache_dir"
      "test_sorting_null_values"
      "test_xdg_existant"
    ] ++ lib.optionals stdenv.isDarwin [
      "test_sorting_fields"
    ];
  
negative.code: { lib
  , stdenv
  , fetchFromGitHub
  , glibcLocales
  , installShellFiles
  , jq
  , python3
  }:
  
  python3.pkgs.buildPythonApplication rec {
    pname = "todoman";
    version = "4.1.0";
    format = "setuptools";
  
    src = fetchFromGitHub {
      owner = "pimutils";
      repo = pname;
      rev = "refs/tags/v${version}";
      hash = "sha256-MItFZ+4Q7UKeIWHl8KFiWOLNgFcfb0h1YWjPd+g48Wg=";
    };
  
    SETUPTOOLS_SCM_PRETEND_VERSION = version;
  
    nativeBuildInputs = [
      installShellFiles
    ] ++ (with python3.pkgs; [
      setuptools-scm
    ]);
  
    propagatedBuildInputs = with python3.pkgs; [
      atomicwrites
  