nixpkgs/pkgs/misc/vim-plugins/vim2nix/additional-nix-code/vim-isort

    postPatch = ''
      substituteInPlace ftplugin/python_vimisort.vim \
          --replace 'import vim' 'import vim; import sys; sys.path.append("${pythonPackages.isort}/${python.sitePackages}")'
    '';