anchor.diff:      };
     };
   
  -  urlview = mkDerivation {
  +  urlview = mkTmuxPlugin {
       pluginName = "urlview";
       version = "unstable-2016-01-06";
       src = fetchFromGitHub {
  
positive.code:     };
    };
  
    fingers = mkDerivation rec {
      pluginName = "fingers";
      rtpFilePath = "tmux-fingers.tmux";
      version = "1.0.1";
  
negative.code:     };
    };
  
    online-status = mkTmuxPlugin {
      pluginName = "online-status";
      version = "unstable-2018-11-30";
      src = fetchFromGitHub {
  