updated

flake.nix

@@ -17,10 +17,26 @@
           pname = "cinny-desktop";
           inherit version;
 
+          cinny-desktop-item = pkgs.makeDesktopItem {
+            name = "cinny-desktop";
+            desktopName = "Cinny";
+            comment = "Matrix client";
+            exec = "cinny-desktop";
+            icon = "cinny"; # see icon notes below
+            categories = [ "Network" "InstantMessaging" ];
+            terminal = false;
+          };
+
           src = pkgs.fetchurl {
             url = "https://github.com/cinnyapp/cinny-desktop/releases/download/v${version}/Cinny_desktop-x86_64.AppImage";
             sha256 = "sha256-dHBYTT943vbk9ozYh+9h4Pl1QSfoXAEbUXUMOptVo88=";
           };
+
+          extraInstallCommands = ''
+            mkdir -p $out/share/applications
+            ln -s ${cinny-desktop-item}/share/applications/* \
+              $out/share/applications/
+          '';
         };
       in
       {