diff --git a/.drone.yml b/.drone.yml
index 65dd459..5fea9b5 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -17,6 +17,8 @@ steps:
       from_secret: pass
     REGISTRY:
       from_secret: registry
+    MAKEFLAGS: '-j 1'
+    MAKEOPTS: '-j 1'
   volumes:
   - name: dockersock
     path: /var/run/docker.sock
@@ -25,7 +27,7 @@ steps:
   - git submodule update --init --recursive
   - docker login -u $USER -p $PASS $REGISTRY
   - docker run --rm --privileged $REGISTRY/qemu-user-static --reset -p yes
-  - docker buildx build --platform amd64 --build-arg MAKEFLAGS='-j 1' --build-arg MAKEOPTS='-j 1' -t bind9-docker ./bind9-docker
+  - docker buildx build --platform amd64 -t bind9-docker ./bind9-docker
   - docker buildx build --platform amd64 -t $REGISTRY/bind9 ./bind
   - docker push $REGISTRY/bind9
   - docker tag $REGISTRY/bind9 $REGISTRY/bind9:amd64