diff --git a/shell.nix b/shell.nix
index 386588a..46496ba 100644
--- a/shell.nix
+++ b/shell.nix
@@ -8,6 +8,8 @@ let
     jzon
     serapeum
     deploy
+    spinneret
+    lass
     pkgs.openssl
     pkgs.openssl.out
     pkgs.openssl.dev