diff --git a/.generator/cli.py b/.generator/cli.py
index f52d3019e2d6..30d22cc61a82 100644
--- a/.generator/cli.py
+++ b/.generator/cli.py
@@ -369,12 +369,13 @@ def _copy_files_needed_for_post_processing(
     path_to_library = f"packages/{library_id}" if is_mono_repo else "."
     source_dir = f"{input}/{path_to_library}"
 
-    shutil.copytree(
-        source_dir,
-        output,
-        dirs_exist_ok=True,
-        ignore=shutil.ignore_patterns("client-post-processing"),
-    )
+    if Path(source_dir).exists():
+        shutil.copytree(
+            source_dir,
+            output,
+            dirs_exist_ok=True,
+            ignore=shutil.ignore_patterns("client-post-processing"),
+        )
 
     # We need to create these directories so that we can copy files necessary for post-processing.
     os.makedirs(
diff --git a/.generator/test_cli.py b/.generator/test_cli.py
index d89ec3c6e953..d1c90707bbc2 100644
--- a/.generator/test_cli.py
+++ b/.generator/test_cli.py
@@ -859,6 +859,7 @@ def test_copy_files_needed_for_post_processing_copies_files_from_generator_input
     """Tests that .repo-metadata.json is copied if it exists."""
     mock_makedirs = mocker.patch("os.makedirs")
     mock_shutil_copytree = mocker.patch("shutil.copytree")
+    mocker.patch("pathlib.Path.exists", return_value=True)
 
     _copy_files_needed_for_post_processing(
         "output", "input", "library_id", is_mono_repo