anchor.diff:    '';
   
     buildInputs = devDeps ++ libraryDevDeps ++ [
  +    changelog
  +    mic
       pythonEnv
       (pythonEnv.python.pkgs.toPythonApplication pkgs.pre-commit)
  -    mic
     ];
   
     PYTHONPATH = builtins.toPath ./.;
  
positive.code: 
    pythonShortVersion = builtins.replaceStrings [ "." ] [ "" ] python;
    pythonEnv = pkgs."ibisDevEnv${pythonShortVersion}";
    mic = pkgs.writeShellApplication {
      name = "mic";
      runtimeInputs = [ pythonEnv ];
  
negative.code:     curl
      duckdb
      git
      glow
      jq
      just
      lychee
  