diff --git a/legendary/utils/env.py b/legendary/utils/env.py
new file mode 100644
index 0000000..669968c
--- /dev/null
+++ b/legendary/utils/env.py
@@ -0,0 +1,10 @@
+import os
+import sys
+
+
+def is_pyinstaller():
+    return getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS')
+
+
+def is_windows_or_pyi():
+    return is_pyinstaller() or os.name == 'nt'