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')