chore(users/Profpatsch): clean up haskell libs a little

Change-Id: Ia9a6c5a754ca8f2912308feb5a26f5276a08d24c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9011
Reviewed-by: Profpatsch <mail@profpatsch.de>
Autosubmit: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

users/Profpatsch/mailbox-org/default.nix

@@ -7,7 +7,7 @@ let
 
     src = depot.users.Profpatsch.exactSource ./. [
       ./mailbox-org.cabal
-      ./AesonQQ.hs
+      ./src/AesonQQ.hs
       ./MailboxOrg.hs
     ];