diff --git a/tests/run.py b/tests/run.py
index 2f514d1..77dae8e 100755
--- a/tests/run.py
+++ b/tests/run.py
@@ -38,6 +38,7 @@ def build_profile(
     cmd = [
         "nix",
         "build",
+        "--extra-experimental-features", "nix-command",
         "-f",
         "build-profile.nix",
         "-I",