diff --git a/overlays/30-ghc.nix b/overlays/30-ghc.nix
index edb5596e..6c88a73f 100644
--- a/overlays/30-ghc.nix
+++ b/overlays/30-ghc.nix
@@ -12,7 +12,7 @@ let
       inherit (p)
         brittany ormolu releaser cabal-fmt stack ghcide cabal-install dhall
         aeson unordered-containers these neuron taskwarrior pandoc hlint
-        cabal2nix;
+        cabal2nix weeder;
     } // makeHaskellScriptPackages p;
 in {
   myHaskellPackages = makeHaskellPackages master.haskellPackages;