anchor.diff:      ];
   
       linux = [
  -      hexchat
         sift
         fzf
  +      mysql
       ];
     };
  +
  +  x11-tools = pkg-set {
  +    linux = [
  +      pavucontrol
  +      feh
  +      rofi
  +      arandr
  +      xorg.xdpyinfo
  +      xclip
  +    ];
  +  };
  +
  +  node-env = [
  +    nodejs
  +    eslint
  +  ];
   
     go-env = [
       go
  
positive.code:     go2nix
    ];
  
    x11 = pkg-set {
      linux = [
        pavucontrol
        feh
        rofi
        arandr
        xorg.xdpyinfo
        xclip
      ];
    };
  in
    rec {
      allowUnfree = true;
  
negative.code:         name = "dev-env";
          paths =
            nix-tools
            ++ my-tools
            ++ linux-tools
            ++ network-tools
            ++ security-tools
            ++ desktop-apps
            ++ dev-tools
            ++ x11-tools
            ++ go-env
            ++ node-env;
        };
  
        python2-tools = pkgs.buildEnv {
  