anchor.diff:  
     sidebar = mkDerivation {
       pluginName = "sidebar";
  -    src = fetchgit {
  -      url = "https://github.com/tmux-plugins/tmux-sidebar";
  -      rev = "23014524cab53f8d36373983500fe05a527a444d";
  -      sha256 = "1w363587isdip1r81h0vkp5163lpa83lvasg8l04h43sbip2y6i8";
  +    version = "unstable-2018-11-30";
  +    src = fetchFromGitHub {
  +      owner = "tmux-plugins";
  +      repo = "tmux-sidebar";
  +      rev = "aacbdb45bc5ab69db448a72de4155d0b8dbac677";
  +      sha256 = "1bp90zbv19kbbiik0bgb893ybss1jqsnk3353a631993xjwsih7c";
       };
     };
   
     sysstat = mkDerivation {
       pluginName = "sysstat";
  +    version = "unstable-2017-12-12";
       src = fetchFromGitHub {
         owner = "samoshkin";
         repo = "tmux-plugin-sysstat";
  
positive.code: { fetchgit
  , fetchFromGitHub
  , lib
  , pkgs
  , reattach-to-user-namespace
  , stdenv
  
negative.code: 
    open = mkDerivation {
      pluginName = "open";
      version = "unstable-2019-12-02";
      src = fetchFromGitHub {
        owner = "tmux-plugins";
        repo = "tmux-open";
        rev = "cedb4584908bd8458fadc8d3e64101d3cbb48d46";
        sha256 = "10s0xdhmg0dhpj13ybcq72pw3xgb2dq5v5h2mwidzqyh9g17wndh";
      };
    };
  
    pain-control = mkDerivation {
      pluginName = "pain-control";
      version = "unstable-2020-02-18";
      src = fetchFromGitHub {
        owner = "tmux-plugins";
        repo = "tmux-pain-control";
        rev = "2db63de3b08fc64831d833240749133cecb67d92";
        sha256 = "0w7a6n4n86ysiqcqj12j2hg9r5fznvbp3dz8pzas9q1k3avlk0zk";
      };
    };
  
    plumb = mkDerivation rec {
      pluginName = "plumb";
      version = "0.1.1";
      src = fetchFromGitHub {
        owner = "eraserhd";
        repo = "tmux-plumb";
        rev = "v${version}";
        sha256 = "1c6k4fdl0az9811r6k164mgd4w5la75xr6x7nabmy046xc0z5i2r";
      };
      postInstall = ''
  