diff --git a/launcher.py b/launcher.py
index e40e4b6f2..d7d3dd893 100644
--- a/launcher.py
+++ b/launcher.py
@@ -418,7 +418,7 @@ def user_pick_yes_no():
 
 
 def remove_readonly(func, path, excinfo):
-    os.chmod(path, stat.S_IWRITE)
+    os.chmod(path, 0o755)
     func(path)
 
 
@@ -426,12 +426,12 @@ def remove_reqs_readonly():
     """Workaround for issue #569"""
     if not os.path.isdir(REQS_DIR):
         return
-    os.chmod(REQS_DIR, stat.S_IWRITE)
+    os.chmod(REQS_DIR, 0o755)
     for root, dirs, files in os.walk(REQS_DIR):
         for d in dirs:
-            os.chmod(os.path.join(root, d), stat.S_IWRITE)
+            os.chmod(os.path.join(root, d), 0o755)
         for f in files:
-            os.chmod(os.path.join(root, f), stat.S_IWRITE)
+            os.chmod(os.path.join(root, f), 0o755)
 
 
 def calculate_md5(filename):