Add missing dependency for mtl

alexbiehl-gc · alexbiehl · commit 67a3b7d35a85 · 2021-02-07T21:35:04.000+01:00
diff --git a/haddock.cabal b/haddock.cabal
@@ -85,7 +85,8 @@ executable haddock
       bytestring,
       parsec,
       text,
-      transformers
+      transformers,
+      mtl
 
     other-modules:
       CompatPrelude
