anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "wingpanel-applications-menu";
  -  version = "2.9.0";
  +  version = "2.9.1";
   
     repoName = "applications-menu";
   
  
positive.code:     owner = "elementary";
      repo = repoName;
      rev = version;
      sha256 = "0mwjw2ghbdj336ax5srxbqnjprdhj1if7sm9k9idqkmifpzccs7i";
    };
  
    passthru = {
      updateScript = nix-update-script {
        attrPath = "pantheon.${pname}";
      };
    };
  
    nativeBuildInputs = [
      gettext
  
negative.code:     "--sysconfdir=${placeholder "out"}/etc"
    ];
  
    postPatch = ''
      chmod +x meson/post_install.py
      patchShebangs meson/post_install.py
    '';
  
    passthru = {
      updateScript = nix-update-script {
        attrPath = "pantheon.${pname}";
      };
    };
  
    meta = with lib; {
      description = "Lightweight and stylish app launcher for Pantheon";
  