anchor.diff: -{ stdenv, python3, glibcLocales }:
  +{ stdenv, python3, glibcLocales, installShellFiles, jq }:
   
   let
     inherit (python3.pkgs) buildPythonApplication fetchPypi;
  
positive.code:     LANG = "en_US.UTF-8";
      LC_TYPE = "en_US.UTF-8";
  
    buildInputs = [ glibcLocales ];
    propagatedBuildInputs = with python3.pkgs;
      [ atomicwrites click click-log click-repl configobj humanize icalendar parsedatetime
  
negative.code: 
    makeWrapperArgs = [ "--set LOCALE_ARCHIVE ${glibcLocales}/lib/locale/locale-archive"
                        "--set CHARSET en_us.UTF-8" ];
  
    postInstall = ''
      installShellCompletion --bash contrib/completion/bash/_todo
      substituteInPlace contrib/completion/zsh/_todo --replace "jq " "${jq}/bin/jq "
      installShellCompletion --zsh contrib/completion/zsh/_todo
    '';
  
    preCheck = ''
      # Remove one failing test that only checks whether the command line works
  