diff --git a/shenvs/anpi.nix b/shenvs/anpi.nix
index c3c2a6e..4605202 100644
--- a/shenvs/anpi.nix
+++ b/shenvs/anpi.nix
@@ -11,5 +11,6 @@ pkgs: {
 	matplotlib
     ]))
     ghc
+    haskell-language-server
   ];
 }