diff --git a/stack.yaml b/stack.yaml
index 0c6668d..f53159f 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -8,8 +8,12 @@ extra-deps:
 - static-bytes-0.1.0
 - companion-0.1.0
 - aeson-warning-parser-0.1.0
+- hpack-0.35.0
 - git: https://github.com/commercialhaskell/pantry.git
-  commit: 8e771ed7178d3b0948cba06f307455c2ca1b5e53
+  commit: 5df643cc1deb561d9c52a9cb6f593aba2bc4c08e
 
 drop-packages:
 - Cabal
+
+nix:
+  shell-file: shell.nix