diff --git a/start.py b/start.py
index c911027..15fa3b2 100644
--- a/start.py
+++ b/start.py
@@ -8,12 +8,18 @@ if src_path not in sys.path:
     sys.path.insert(0, src_path)
 
 # App-capture library paths (built via meson in src/window/switcher/app-capture/builddir)
-_app_capture_builddir = os.path.join(src_path, "window", "switcher", "app-capture", "builddir")
+_app_capture_builddir = os.path.join(
+    src_path, "window", "switcher", "app-capture", "builddir"
+)
 if os.path.isdir(_app_capture_builddir):
     for env_var in ("GI_TYPELIB_PATH", "LD_LIBRARY_PATH"):
         current = os.environ.get(env_var, "")
         if _app_capture_builddir not in current.split(os.pathsep):
-            os.environ[env_var] = f"{_app_capture_builddir}{os.pathsep}{current}" if current else _app_capture_builddir
+            os.environ[env_var] = (
+                f"{_app_capture_builddir}{os.pathsep}{current}"
+                if current
+                else _app_capture_builddir
+            )
 
 
 # Apply monkey patch for hyprland lua dispatcher