diff --git a/flake.lock b/flake.lock
index d3387268b7fb1..94b13f4e1ef43 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1716811426,
-        "narHash": "sha256-A7hAiX85+GnXrwYNkOlzErJ97lpFqklfCrKjKbYq2A4=",
+        "lastModified": 1722254324,
+        "narHash": "sha256-hEFer3XwR9BX5cgDbdEjNMWELMcV5tyzvk68IhNQ9mM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "77e9384f0f7cb5747e4d949ec5f74ab77650e457",
+        "rev": "2bba36f6dfecfdb9e5b56a5996889f1faae6fd0c",
         "type": "github"
       },
       "original": {
diff --git a/nix/shell.nix b/nix/shell.nix
index 808a1f0972a3c..7bdd932a49f6c 100644
--- a/nix/shell.nix
+++ b/nix/shell.nix
@@ -91,6 +91,7 @@ let
   # The version of GHC in `ghcName` is set in nix/overlays/ghc.nix.
   haskellInputs = [
     pkgs.cabal2nix
+    pkgs.ghciwatch
 
     ghc
     hls