diff --git a/.drone.yml b/.drone.yml
index 45b0554..ec428bd 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -25,7 +25,7 @@ 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 -t bind9-docker ./bind9-docker
+  - docker buildx build --platform amd64 -e MAKEFLAGS='-j1' -e MAKEOPTS='-j1' -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