diff --git a/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py b/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py
index c0cf3954..0f35b8ca 100644
--- a/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py
+++ b/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py
@@ -155,7 +155,8 @@ class FilesFiltering(object):
 
         # Make sure we always get at least the standard library location (based on the `os` and
         # `threading` modules -- it's a bit weird that it may be different on the ci, but it happens).
-        roots.append(os.path.dirname(os.__file__))
+        if hasattr(os, "__file__"):
+            roots.append(os.path.dirname(os.__file__))
         roots.append(os.path.dirname(threading.__file__))
         if IS_PYPY:
             # On PyPy 3.6 (7.3.1) it wrongly says that sysconfig.get_path('stdlib') is
diff --git a/src/debugpy/_vendored/pydevd/pydevd_file_utils.py b/src/debugpy/_vendored/pydevd/pydevd_file_utils.py
index 390f903c..ab13b2bc 100644
--- a/src/debugpy/_vendored/pydevd/pydevd_file_utils.py
+++ b/src/debugpy/_vendored/pydevd/pydevd_file_utils.py
@@ -88,7 +88,11 @@ def _get_library_dir():
                 break
 
     if library_dir is None or not os_path_exists(library_dir):
-        library_dir = os.path.dirname(os.__file__)
+        if hasattr(os, "__file__"):
+            library_dir = os.path.dirname(os.__file__)
+
+    if library_dir is None:
+        library_dir = ""  # not possible to detect library_dir
 
     return library_dir