diff --git a/configs/haskell/packages.nix b/configs/haskell/packages.nix
index 500864b..39f0cae 100644
--- a/configs/haskell/packages.nix
+++ b/configs/haskell/packages.nix
@@ -34,6 +34,7 @@ with haskellPackages; [
   contravariant
   criterion
   data-default
+  diagrams
   directory
   dlist
   either