fix imports

app.py

@@ -463,18 +463,26 @@ if not os.path.exists(repo_dir):
     subprocess.run(["git", "clone", "https://github.com/huggingface/transformers.git", repo_dir], check=True)
     subprocess.run(["pip", "install", "-e", repo_dir], check=True)
 
-    # The editable install replaced the transformers package on disk, but
-    # Python's module cache (sys.modules) still holds the version that was
-    # imported at the top of this file.  Flush stale entries and re-import
-    # so that transformers.models.auto.modeling_auto is resolvable on this
-    # very first run (without requiring a restart).
+    # The editable install sets up a .pth file in site-packages so that
+    # transformers is importable on *future* Python startups, but the
+    # current interpreter has already loaded the old version into
+    # sys.modules and the .pth file hasn't been processed by site.py.
+    # Fix both problems:
+    #   1. Put the cloned repo's src/ at the front of sys.path so the
+    #      import machinery can actually find the package.
+    #   2. Flush all stale "transformers" entries from sys.modules.
     import importlib
 
-    importlib.invalidate_caches()
+    _repo_src = os.path.join(repo_dir, "src")
+    if _repo_src not in sys.path:
+        sys.path.insert(0, _repo_src)
+
     _stale_keys = [k for k in sys.modules if k == "transformers" or k.startswith("transformers.")]
     for _k in _stale_keys:
         del sys.modules[_k]
-    import transformers  # re-import from the fresh editable install
+
+    importlib.invalidate_caches()
+    import transformers  # re-import from repo_dir/src/
 
     transformers_path = os.path.dirname(transformers.__file__)
 else: