anchor.diff:    fzf-tmux-url = mkDerivation {
       pluginName = "fzf-tmux-url";
       rtpFilePath = "fzf-url.tmux";
  -    src = fetchgit {
  -      url = "https://github.com/wfxr/tmux-fzf-url";
  -      rev = "ecd518eec1067234598c01e655b048ff9d06ef2f";
  -      sha256 = "0png8hdv91y2nivq5vdii2192mb2qcrkwwn69lzxrdnbfa27qrgv";
  +    version = "unstable-2019-12-02";
  +    src = fetchFromGitHub {
  +      owner = "wfxr";
  +      repo = "tmux-fzf-url";
  +      rev = "2baa410bf7a0f6ceb62a83770baf90d570406ac0";
  +      sha256 = "0rjzzlmxgjrr8g19bg2idcqr9ny07mrq2s39vndg24n0m7znh3fz";
       };
     };
   
     gruvbox = mkDerivation {
       pluginName = "gruvbox";
       rtpFilePath = "gruvbox-tpm.tmux";
  -    src = fetchgit {
  -      url = "https://github.com/egel/tmux-gruvbox";
  +    version = "unstable-2019-05-05";
  +    src = fetchFromGitHub {
  +      owner = "egel";
  +      repo = "tmux-gruvbox";
         rev = "6149fd8b5d6924925b4d5aa6935039780e94f3d6";
         sha256 = "1ykr4yardavd0x7yfrnshd4b0gi8p31pji7i79ib0nss134zncpb";
       };
  
positive.code: 
    prefix-highlight = mkDerivation {
      pluginName = "prefix-highlight";
      src = fetchgit {
        url = "https://github.com/tmux-plugins/tmux-prefix-highlight";
        rev = "34f7125ae46e5123bedad03e08027332d1186186";
        sha256 = "16z8sm8pifg1m9lmv0z50fb0ws9mk5zqs7a1ddl2bfwkqi7yc0c0";
      };
    };
  
    resurrect = mkDerivation {
      pluginName = "resurrect";
      src = fetchgit {
        url = "https://github.com/tmux-plugins/tmux-resurrect";
        rev = "7c77c70483b818d331e46c4cf64c716ded09a152";
        sha256 = "08gjxwdmfy16xpgi87rp9dj5338imqsy392pixf7xcnr05413ap1";
      };
    };
  
    sensible = mkDerivation {
      pluginName = "sensible";
      src = fetchgit {
        url = "https://github.com/tmux-plugins/tmux-sensible";
        rev = "e91b178ff832b7bcbbf4d99d9f467f63fd1b76b5";
        sha256 = "1z8dfbwblrbmb8sgb0k8h1q0dvfdz7gw57las8nwd5gj6ss1jyvx";
      };
  
negative.code: 
    logging = mkDerivation {
      pluginName = "logging";
      version = "unstable-2019-04-19";
      src = fetchFromGitHub {
        owner = "tmux-plugins";
        repo = "tmux-logging";
        rev = "b085ad423b5d59a2c8b8d71772352e7028b8e1d0";
        sha256 = "0p0sawysalhi8k2a5hdxniqx6kb24kd8rnvfzkjqigzid5ik37js";
      };
    };
  
    net-speed = mkDerivation {
      pluginName = "net-speed";
      version = "unstable-2018-12-02";
      src = fetchFromGitHub {
        owner = "tmux-plugins";
        repo = "tmux-net-speed";
        rev = "58abb615971cb617821e2e7e41c660334f55a92d";
        sha256 = "1aj06gdhzcxsydjzf21n9kyxigwf38kh2rg8hh7gnjk260ydqlrc";
      };
    };
  
    maildir-counter = mkDerivation {
      pluginName = "maildir-counter";
      version = "unstable-2016-11-25";
      src = fetchFromGitHub {
        owner = "tmux-plugins";
        repo = "tmux-maildir-counter";
        rev = "9415f0207e71e37cbd870c9443426dbea6da78b9";
        sha256 = "0dwvqhiv9bjwr01hsi5c57n55jyv5ha5m5q1aqgglf4wyhbnfms4";
      };
  