diff --git a/shell.nix b/shell.nix
index d67a849..61a931d 100644
--- a/shell.nix
+++ b/shell.nix
@@ -12,6 +12,7 @@ pkgs.mkShell rec {
     with pkgs;
     [
       haskell.packages.ghc912.ghc
+      haskell.packages.ghc912.haskell-language-server
       zlib
     ]
     ++ map haskell.lib.justStaticExecutables [