anchor.diff:  
   let
     baseName = "bbswitch";
  -  version = "0.8";
  +  version = "unstable-2021-11-29";
     name = "${baseName}-${version}-${kernel.version}";
   
   in
  
positive.code:   src = fetchFromGitHub {
      owner = "Bumblebee-Project";
      repo = "bbswitch";
      rev = "v${version}";
      hash = "sha256-FHC8myKnouNDERVds2QCJj1ZstjHrOzFpb+FDiSBjL4=";
    };
  
    patches = [
      (fetchpatch {
        url = "https://github.com/Bumblebee-Project/bbswitch/pull/102.patch";
        sha256 = "1lbr6pyyby4k9rn2ry5qc38kc738d0442jhhq57vmdjb6hxjya7m";
      })
      (fetchpatch {
        url = "https://github.com/Bumblebee-Project/bbswitch/pull/196.patch";
        sha256 = "02ihy3piws7783qbm9q0mb9s18ipn5ckdy1iar74xn31qjrsn99n";
      })
    ];
  
  
negative.code:     homepage = "https://github.com/Bumblebee-Project/bbswitch";
      maintainers = with maintainers; [ abbradar ];
      license = licenses.gpl2Plus;
    };
  }
  