diff --git a/flake.nix b/flake.nix
index 1c7692a..d33f3d6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -37,6 +37,7 @@
             buildInputs = with haskellPackages'; [
               ghcid
               cabal-install
+              haskell-language-server
             ];
           };
         };
diff --git a/hie.yaml b/hie.yaml
new file mode 100644
index 0000000..04cd243
--- /dev/null
+++ b/hie.yaml
@@ -0,0 +1,2 @@
+cradle:
+  cabal: