diff --git a/config/.doom.d/config.el b/config/.doom.d/config.el
index 15e6917..be0cb2d 100644
--- a/config/.doom.d/config.el
+++ b/config/.doom.d/config.el
@@ -62,3 +62,4 @@
 (pinentry-start)
 
 (add-to-list 'auto-mode-alist '("\\.njk" . web-mode))
+(setq lsp-haskell-formatting-provider "stylish-haskell")
diff --git a/darwin/configuration.nix b/darwin/configuration.nix
index d4e03dd..f95b0a4 100644
--- a/darwin/configuration.nix
+++ b/darwin/configuration.nix
@@ -24,6 +24,11 @@
     supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
   }];
 
+  # Binary Cache for Haskell.nix
+  nix.binaryCachePublicKeys =
+    [ "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" ];
+  nix.binaryCaches = [ "https://hydra.iohk.io" ];
+
   # Create /etc/bashrc that loads the nix-darwin environment.
   programs = {
     zsh = {