diff --git a/umu/umu_run.py b/umu/umu_run.py
index d7f9d743..883e3f2d 100755
--- a/umu/umu_run.py
+++ b/umu/umu_run.py
@@ -52,7 +52,6 @@
 from umu.umu_runtime import setup_umu
 from umu.umu_util import (
     CompatibilityTool,
-    SteamRuntime,
     get_libc,
     get_library_paths,
     has_umu_setup,
@@ -326,7 +325,7 @@ def build_command(
         raise FileNotFoundError(err)
 
     if env.get("UMU_NO_TOOL") == "1":
-        runtime = CompatibilityTool(RUNTIME_VERSIONS[RUNTIME_NAMES["sniper"]].path)
+        runtime = CompatibilityTool(str(RUNTIME_VERSIONS[RUNTIME_NAMES["sniper"]].path), shim)
         # Will run the game within the Steam Runtime w/o Proton
         # Ideally, for reliability, executables should be compiled within
         # the Steam Runtime
diff --git a/umu/umu_util.py b/umu/umu_util.py
index b2efb2c9..907916c9 100644
--- a/umu/umu_util.py
+++ b/umu/umu_util.py
@@ -380,7 +380,7 @@ class SteamRuntime(SteamBase):
     def __init__(self, path: str) -> None:  # noqa: D107
         super().__init__(path)
         self.runtime = (
-            SteamRuntime(self.required_runtime.path.as_posix())
+            SteamRuntime(str(self.required_runtime.path))
             if self.required_tool_appid is not None
             else None
         )