anchor.diff:  
     gammastep = mkRedshift rec {
       pname = "gammastep";
  -    version = "2.0.5";
  +    version = "2.0.6";
   
       src = fetchFromGitLab {
         owner = "chinstrap";
         repo = pname;
         rev = "v${version}";
  -      sha256 = "1l3x4gnichwzbb0529bhm723xpryn5svhhsfdiwlw122q1vmz2q7";
  +      sha256 = "00s457yajnm7vq6jfanyri52pq000jbyjiy6wz2i3f0rq7cc01ya";
       };
   
       meta = redshift.meta // {
  
positive.code:         "--enable-drm=${if withDrm then "yes" else "no"}"
          "--enable-quartz=${if withQuartz then "yes" else "no"}"
          "--enable-corelocation=${if withCoreLocation then "yes" else "no"}"
        ];
  
        buildInputs = [
  
negative.code:         ++ stdenv.lib.optional  withDrm          libdrm
          ++ stdenv.lib.optional  withQuartz       ApplicationServices
          ++ stdenv.lib.optionals withCoreLocation [ CoreLocation Foundation Cocoa ]
          ++ stdenv.lib.optional  withAppIndicator (if (pname != "gammastep")
               then libappindicator
               else libayatana-appindicator)
          ;
  
        pythonPath = [ pygobject3 pyxdg ];
  