diff --git a/engage.toml b/engage.toml
index d28ecff1..8bba0eaf 100644
--- a/engage.toml
+++ b/engage.toml
@@ -184,6 +184,10 @@ cargo test \
 name = "nix-default"
 group = "tests"
 script = """
-bin/nix-build-and-cache just .#default
-nix run -L .#default -- --help
+env DIRENV_DEVSHELL=dynamic \
+    direnv exec . \
+    bin/nix-build-and-cache just .#default
+env DIRENV_DEVSHELL=dynamic \
+    direnv exec . \
+    nix run -L .#default -- --help
 """