♻️ different approach of unpackiging appImages

Signed-off-by: Xaiya Schumin <d.schumin@proton.me>

pkgs/discord-music-presence.nix

@@ -5,35 +5,24 @@
   appimageTools,
   makeDesktopItem,
 }:
-let
-  version = "2.3.5";
+appimageTools.wrapType2 rec {
   pname = "discord-music-presence";
+  version = "2.3.5";
 
   src = fetchurl {
     url = "https://github.com/ungive/discord-music-presence/releases/download/v${version}/musicpresence-${version}-linux-x86_64.AppImage";
     hash = "sha256-M7oDxVevspA3SGuHktS8ChQAYopgIqypiVlzyE4uyqI=";
   };
 
-  icon = fetchurl {
-    url = "https://raw.githubusercontent.com/music-presence/icons/refs/heads/master/dist/logo-app-circle.png";
-    hash = "sha256-ZQMN145GiTiFAYcVVSgaOLP3xSHokf3N0kFI+jf/2Zk=";
-  };
-
-  desktopItem = makeDesktopItem {
-    name = pname;
-    exec = pname;
-    icon = icon;
-    desktopName = pname;
-    genericName = "Discord Music Presence";
-    categories = [ "Application" ];
-  };
-in
-appimageTools.wrapType2 rec {
-  inherit pname version src;
-
-  extraInstallCommands = ''
-    mkdir "$out/share";
-    ln -s "${desktopItem}/share/applications" "$out/share";
+  extraInstallCommands =
+    let
+      contents = appimageTools.extract { inherit pname version src; };
+    in
+    ''
+      install -m 444 -D ${contents}/musicpresence.desktop -t $out/share/applications
+      substituteInPlace $out/share/applications/musicpresence.desktop \
+        --replace-fail Exec=musicpresence Exec=$out/bin/${pname}
+      cp -r ${contents}/usr/share/icons $out/share
     '';
 
   meta = {