chore(users/Profpatsch/*): more cabal maintenance

Change-Id: Ib1714abce2815873eb50dbeac088e812fa9098ab
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8686
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Autosubmit: Profpatsch <mail@profpatsch.de>

users/Profpatsch/arglib/netencode.nix

@@ -57,7 +57,9 @@ let
     ];
 
     libraryHaskellDepends = [
-      depot.users.Profpatsch.my-prelude
+      pkgs.haskellPackages.pa-prelude
+      pkgs.haskellPackages.pa-label
+      pkgs.haskellPackages.pa-error-tree
       depot.users.Profpatsch.netencode.netencode-hs
       depot.users.Profpatsch.execline.exec-helpers-hs
     ];