diff --git a/pkgs/by-name/mi/minigalaxy/inject-launcher-steam-run.diff b/pkgs/by-name/mi/minigalaxy/inject-launcher-steam-run.diff
deleted file mode 100644
index d619219f50fe..000000000000
--- a/pkgs/by-name/mi/minigalaxy/inject-launcher-steam-run.diff
+++ /dev/null
@@ -1,32 +0,0 @@
-diff --git a/minigalaxy/launcher.py b/minigalaxy/launcher.py
-index aeca3e3..aeb6763 100644
---- a/minigalaxy/launcher.py
-+++ b/minigalaxy/launcher.py
-@@ -84,6 +84,7 @@ def get_execute_command(game) -> list:
-     if game.get_info("use_mangohud") is True:
-         exe_cmd.insert(0, "mangohud")
-         exe_cmd.insert(1, "--dlsym")
-+    exe_cmd.insert(0, "@steamrun@")
-     exe_cmd = get_exe_cmd_with_var_command(game, exe_cmd)
-     logger.info("Launch command for %s: %s", game.name, " ".join(exe_cmd))
-     return exe_cmd
-diff --git a/tests/test_installer.py b/tests/test_installer.py
-index d459b62..dee93cb 100644
---- a/tests/test_installer.py
-+++ b/tests/test_installer.py
-@@ -405,13 +405,13 @@ class Test(TestCase):
-         mock_list_dir.return_value = ["data", "docs", "scummvm", "support", "beneath.ini", "gameinfo", "start.sh"]
- 
-         result1 = installer.get_exec_line(game1)
--        self.assertEqual("scummvm -c beneath.ini", result1)
-+        self.assertEqual("@steamrun@ scummvm -c beneath.ini", result1)
- 
-         game2 = Game("Blocks That Matter", install_dir="/home/test/GOG Games/Blocks That Matter", platform="linux")
-         mock_list_dir.return_value = ["data", "docs", "support", "gameinfo", "start.sh"]
- 
-         result2 = installer.get_exec_line(game2)
--        self.assertEqual('"/home/test/GOG Games/Blocks That Matter/start.sh"', result2)
-+        self.assertEqual('@steamrun@ "/home/test/GOG Games/Blocks That Matter/start.sh"', result2)
- 
-     @mock.patch('os.path.getsize')
-     @mock.patch('os.listdir')
diff --git a/pkgs/by-name/mi/minigalaxy/inject-launcher-umu-run.diff b/pkgs/by-name/mi/minigalaxy/inject-launcher-umu-run.diff
new file mode 100644
index 000000000000..b965056ab086
--- /dev/null
+++ b/pkgs/by-name/mi/minigalaxy/inject-launcher-umu-run.diff
@@ -0,0 +1,47 @@
+diff --git a/minigalaxy/installer.py b/minigalaxy/installer.py
+index a68c2c8..2a34680 100644
+--- a/minigalaxy/installer.py
++++ b/minigalaxy/installer.py
+@@ -477,7 +477,7 @@ def postinstaller(game):
+     postinst_script = os.path.join(game.install_dir, "support", "postinst.sh")
+     if os.path.isfile(postinst_script):
+         os.chmod(postinst_script, 0o775)
+-        stdout, stderr, exitcode = _exe_cmd([postinst_script])
++        stdout, stderr, exitcode = _exe_cmd(["env", "PROTONPATH=umu-sniper", "@umurun@", postinst_script])
+         if exitcode not in [0]:
+             err_msg = "Postinstallation script failed: {}".format(postinst_script)
+     return err_msg
+diff --git a/minigalaxy/launch_command.py b/minigalaxy/launch_command.py
+index fc27c1a..cf9de5f 100644
+--- a/minigalaxy/launch_command.py
++++ b/minigalaxy/launch_command.py
+@@ -11,11 +11,15 @@ class LaunchCommand:
+     command: list[str]
+ 
+     def apply_game_launch_config(self, game: Game) -> None:
++        if self.name == "start.sh":
++            self.command.insert(0, "@umurun@")
+         if game.get_info(InfoKey.GAMEMODE) is True:
+             self.command.insert(0, "gamemoderun")
+         if game.get_info(InfoKey.MANGOHUD) is True:
+             self.command.insert(0, "mangohud")
+-            self.command.insert(1, "--dlsym")
++        if self.name == "start.sh":
++            self.command.insert(0, "PROTONPATH=umu-sniper")
++            self.command.insert(0, "env")
+ 
+         var_list = shlex.split(game.get_info(InfoKey.VARIABLES))
+         command_list = shlex.split(game.get_info(InfoKey.COMMAND))
+diff --git a/tests/test_installer.py b/tests/test_installer.py
+index 4b2fe1e..fd4dfef 100644
+--- a/tests/test_installer.py
++++ b/tests/test_installer.py
+@@ -440,7 +440,7 @@ class Test(TestCase):
+         mock_list_dir.return_value = ["data", "docs", "support", "gameinfo", "start.sh"]
+ 
+         result2 = installer.get_exec_line(game2)
+-        self.assertEqual('"/home/test/GOG Games/Blocks That Matter/start.sh"', result2)
++        self.assertEqual('env PROTONPATH=umu-sniper @umurun@ "/home/test/GOG Games/Blocks That Matter/start.sh"', result2)
+ 
+     @mock.patch('os.path.getsize')
+     @mock.patch('os.listdir')
diff --git a/pkgs/by-name/mi/minigalaxy/package.nix b/pkgs/by-name/mi/minigalaxy/package.nix
index 61a041684c5a..24d683eb8888 100644
--- a/pkgs/by-name/mi/minigalaxy/package.nix
+++ b/pkgs/by-name/mi/minigalaxy/package.nix
@@ -1,15 +1,16 @@
 {
-  lib,
   fetchFromGitHub,
-  glibcLocales,
   glib-networking,
+  glibcLocales,
   gobject-introspection,
   gtk3,
+  innoextract,
+  lib,
   libnotify,
   nix-update-script,
   python3Packages,
-  steam-run,
   replaceVars,
+  umu-launcher,
   unzip,
   webkitgtk_4_1,
   wrapGAppsHook3,
@@ -18,25 +19,25 @@
 
 python3Packages.buildPythonApplication rec {
   pname = "minigalaxy";
-  version = "1.4.1";
+  version = "1.4.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "sharkwouter";
     repo = "minigalaxy";
     tag = version;
-    hash = "sha256-YZhgVeWdVaNiTj7hvYuHbaVtoKN6EFoOANWdkrlj4dU=";
+    hash = "sha256-qq5XLWmQ0x6/hK8beKxJDxHmbu//EuukuyOG+CpF9ug=";
   };
 
   patches = [
-    (replaceVars ./inject-launcher-steam-run.diff {
-      steamrun = lib.getExe steam-run;
+    (replaceVars ./inject-launcher-umu-run.diff {
+      umurun = lib.getExe umu-launcher;
     })
   ];
 
   nativeBuildInputs = [
-    wrapGAppsHook3
     gobject-introspection
+    wrapGAppsHook3
   ];
 
   buildInputs = [
@@ -72,6 +73,7 @@ python3Packages.buildPythonApplication rec {
       "''${gappsWrapperArgs[@]}"
       --suffix PATH : "${
         lib.makeBinPath [
+          innoextract
           unzip
           xdg-utils
         ]