diff --git a/lib/GHCup.hs b/lib/GHCup.hs
index 56473fb..a94876a 100644
--- a/lib/GHCup.hs
+++ b/lib/GHCup.hs
@@ -586,7 +586,7 @@ installStackBindist dlinfo ver = do
            , settings
            } <- lift ask
 
-  whenM (lift (hlsInstalled ver))
+  whenM (lift (stackInstalled ver))
     (throwE $ AlreadyInstalled Stack ver)
 
   -- download (or use cached version)