diff --git a/remotefilelog/shallowutil.py b/remotefilelog/shallowutil.py
--- a/remotefilelog/shallowutil.py
+++ b/remotefilelog/shallowutil.py
@@ -457,7 +457,11 @@
             path = os.path.dirname(path)
 
         for path in reversed(missingdirs):
-            os.mkdir(path)
+            try:
+                os.mkdir(path)
+            except OSError as ex:
+                if ex.errno != errno.EEXIST:
+                    raise
 
         for path in missingdirs:
             setstickygroupdir(path, gid, ui.warn)