diff --git a/shell.nix b/shell.nix
index 1fa25de79..6b211f6e6 100644
--- a/shell.nix
+++ b/shell.nix
@@ -41,6 +41,7 @@ let
     file-embed
     filepath
     haddock-library
+    haskell-language-server
     hsc2hs
     hslua
     hslua-module-system