diff --git a/directory.cabal b/directory.cabal
index 5d8c6553..fe462e9a 100644
--- a/directory.cabal
+++ b/directory.cabal
@@ -38,7 +38,7 @@ source-repository head
 
 flag os-string
   description: Use the new os-string package
-  default: False
+  default: True
   manual: False
 
 Library