anchor.diff:  
     wordnet = callPackage ../applications/misc/wordnet { };
   
  -  wrapFirefox = browser: browserName: nameSuffix: import ../applications/networking/browsers/firefox/wrapper.nix {
  -    inherit stdenv nameSuffix makeWrapper makeDesktopItem browser browserName;
  -    plugins =
  -      let
  -        enableAdobeFlash = getConfig [ browserName "enableAdobeFlash" ] true;
  -        enableGnash = getConfig [ browserName "enableGnash" ] false;
  -      in
  -       assert !(enableGnash && enableAdobeFlash);
  -       ([ ]
  -        ++ lib.optional enableGnash gnash
  -        ++ lib.optional enableAdobeFlash flashplayer
  -        # RealPlayer is disabled by default for legal reasons.
  -        ++ lib.optional (system != "i686-linux" && getConfig [browserName "enableRealPlayer"] false) RealPlayer
  -        ++ lib.optional (getConfig [browserName "enableDjvu"] false) (djview4)
  -        ++ lib.optional (getConfig [browserName "enableMPlayer"] false) (MPlayerPlugin browser)
  -        ++ lib.optional (getConfig [browserName "enableGeckoMediaPlayer"] false) gecko_mediaplayer
  -        ++ lib.optional (supportsJDK && getConfig [browserName "jre"] false && jrePlugin ? mozillaPlugin) jrePlugin
  -        ++ lib.optional (getConfig [browserName "enableGoogleTalkPlugin"] false) google_talk_plugin
  -       );
  -  };
  +  wrapFirefox =
  +    { browser, browserName ? "firefox", desktopName ? "Firefox", nameSuffix ? "" }:
  +    import ../applications/networking/browsers/firefox/wrapper.nix {
  +      inherit stdenv makeWrapper makeDesktopItem browser browserName desktopName nameSuffix;
  +      plugins =
  +        let
  +          enableAdobeFlash = getConfig [ browserName "enableAdobeFlash" ] true;
  +          enableGnash = getConfig [ browserName "enableGnash" ] false;
  +        in
  +         assert !(enableGnash && enableAdobeFlash);
  +         ([ ]
  +          ++ lib.optional enableGnash gnash
  +          ++ lib.optional enableAdobeFlash flashplayer
  +          # RealPlayer is disabled by default for legal reasons.
  +          ++ lib.optional (system != "i686-linux" && getConfig [browserName "enableRealPlayer"] false) RealPlayer
  +          ++ lib.optional (getConfig [browserName "enableDjvu"] false) (djview4)
  +          ++ lib.optional (getConfig [browserName "enableMPlayer"] false) (MPlayerPlugin browser)
  +          ++ lib.optional (getConfig [browserName "enableGeckoMediaPlayer"] false) gecko_mediaplayer
  +          ++ lib.optional (supportsJDK && getConfig [browserName "jre"] false && jrePlugin ? mozillaPlugin) jrePlugin
  +          ++ lib.optional (getConfig [browserName "enableGoogleTalkPlugin"] false) google_talk_plugin
  +         );
  +    };
   
     x11vnc = callPackage ../tools/X11/x11vnc { };
   
  
positive.code: 
    firefox = pkgs.firefoxPkgs.firefox;
  
    firefoxWrapper = wrapFirefox pkgs.firefox "firefox" "";
  
    firefoxPkgs = pkgs.firefox60Pkgs;
  
    firefox36Pkgs = callPackage ../applications/networking/browsers/firefox/3.6.nix {
      inherit (gtkLibs) gtk pango;
      inherit (gnome) libIDL;
    };
  
    firefox36Wrapper = wrapFirefox firefox36Pkgs.firefox "firefox" "";
  
    firefox50Pkgs = callPackage ../applications/networking/browsers/firefox/5.0.nix {
      inherit (gtkLibs) gtk pango;
      inherit (gnome) libIDL;
    };
  
    firefox50Wrapper = wrapFirefox firefox50Pkgs.firefox "firefox" "";
  
    firefox60Pkgs = callPackage ../applications/networking/browsers/firefox/6.0.nix {
      inherit (gtkLibs) gtk pango;
      inherit (gnome) libIDL;
    };
  
    firefox60Wrapper = wrapFirefox firefox60Pkgs.firefox "firefox" "";
  
    firefox70Pkgs = callPackage ../applications/networking/browsers/firefox/7.0.nix {
      inherit (gtkLibs) gtk pango;
      inherit (gnome) libIDL;
    };
  
    firefox70Wrapper = lowPrio (wrapFirefox firefox70Pkgs.firefox "firefox" "");
  
    firefox80bPkgs = callPackage ../applications/networking/browsers/firefox/8.0.nix {
      inherit (gtkLibs) gtk pango;
  
negative.code:     patchelf = patchelf06;
    };
  
    chromeWrapper = wrapFirefox { browser = chrome; browserName = "chrome"; desktopName = "Chrome"; };
  
    cinelerra = callPackage ../applications/video/cinelerra {
      inherit (gnome) esound;
  