anchor.diff:  , git
   , glib
   , gnome-themes-standard
  -, gtk_2
  +, gsettings-desktop-schemas
  +, gtk_3
   , gvfs
   , libcap
   , libgnome-keyring
  
positive.code: , lib
  , makeWrapper
  
  , alsa-lib
  , atk
  , cairo
  
negative.code:   sources = {
      "stable" = {
        suffix = "";
        version = "1.29.0";
        sha256 = "dfa598d38216ab9dc187e40d279cb69a57b6c9dc3d1ca8d0c4140bae90bd1838";
      };
      "beta" = {
        suffix = "-beta";
        version = "1.30.0-beta2";
        sha256 = "3217d100519578dacf3e770ed3cfc82460825bf5e3fd8ff9453b8540298678cf";
      };
    };
    source = sources."${channel}";
  