diff --git a/.drone.yml b/.drone.yml
index cc26732..7383a2a 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -30,5 +30,5 @@ steps:
     image: nixos/nix:2.11.0
     commands:
       - cd algo2/radix-heap
-      - stack build
-      - stack test
+      - nix-shell --run "stack build"
+      - nix-shell --run "stack test"