diff --git a/direct/src/showutil/dist.py b/direct/src/showutil/dist.py
index fad55b5880..a8b3bc446c 100644
--- a/direct/src/showutil/dist.py
+++ b/direct/src/showutil/dist.py
@@ -46,7 +46,8 @@ def find_packages(whlfile):
 
 def get_python_ext_module_dir():
     import cmath
-    return os.path.dirname(cmath.__file__)
+    import inspect
+    return os.path.dirname(inspect.getfile(cmath))
 
 
 class build(distutils.command.build.build):
diff --git a/makepanda/makewheel.py b/makepanda/makewheel.py
index d1e67b185e..42847b2102 100644
--- a/makepanda/makewheel.py
+++ b/makepanda/makewheel.py
@@ -82,7 +82,8 @@ def is_fat_file(path):
 
 def get_python_ext_module_dir():
     import cmath
-    return os.path.dirname(cmath.__file__)
+    import inspect
+    return os.path.dirname(inspect.getfile(cmath))
 
 
 if sys.platform in ('win32', 'cygwin'):