used embeded .desktop file and icons

flake.nix

@@ -15,31 +15,28 @@
     name = "starc";
     version = "0.6.4";
 
-    appImage = pkgs.fetchurl {
+    src = pkgs.fetchurl {
       url = "https://github.com/story-apps/starc/releases/download/v${version}/starc-setup.AppImage";
       sha256 = "sha256-KLawvuLyqd7aPidH3ghr7mLl9NFQ7nduhnxAq0RpToQ=";
     };
   in {
     packages.${system} = {
       default = pkgs.appimageTools.wrapType2 {
-        inherit name;
-
-        src = appImage;
+        inherit name src;
 
         extraInstallCommands = let
           contents = pkgs.appimageTools.extract {
-            src = appImage;
-            pname = name;
-            inherit version;
+            inherit name src;
           };
         in ''
           # Install .desktop file
-          mkdir -p $out/share/applications
-          cp ${contents}/${name}.desktop $out/share/applications
+          install -m 444 ${contents}/${name}.desktop -Dt $out/share/applications
 
           # Install icons
-          mkdir -p $out/share
-          cp -r ${contents}/share/icons $out/share
+          for file in $(find ${contents}/share/icons -type f); do
+            directory=$(dirname ''${file#${contents}})
+            install -m 444 $file -D $out/$directory/${name}.png
+          done
         '';
       };
     };
@@ -47,7 +44,7 @@
     apps.${system} = {
       dev = {
         program = "${pkgs.writeShellScript "download-appimage" ''
-          ${pkgs.curl}/bin/curl ${appImage.url} -Lo ${name}.AppImage
+          ${pkgs.curl}/bin/curl ${src.url} -Lo ${name}.AppImage
         ''}";
         type = "app";
       };