diff --git a/.drone.yml b/.drone.yml
index ddcb830..baf3011 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -7,4 +7,4 @@ steps:
     commands:
       - sudo chown -R opam .
       - git -C /home/opam/opam-repository pull origin && opam update
-      - opam install -t -y .
+      - opam depext -i -t .