--- a/gameServer/HWProtoLobbyState.hs	Fri Oct 06 22:37:44 2023 +0200
+++ b/gameServer/HWProtoLobbyState.hs	Wed Jan 10 20:54:29 2024 +0100
@@ -21,6 +21,7 @@
 
 import Data.Maybe
 import Data.List
+import Control.Monad
 import Control.Monad.Reader
 import qualified Data.ByteString.Char8 as B
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