diff --git a/.woodpecker/build.yaml b/.woodpecker/build.yaml
index 057cbe8..7bcd6cc 100644
--- a/.woodpecker/build.yaml
+++ b/.woodpecker/build.yaml
@@ -16,6 +16,9 @@ steps:
           username: {from_secret: kokuwa_io_username}
           password: {from_secret: kokuwa_io_password}
       platform: [linux/amd64, linux/arm64]
+      build-args:
+        NPM_CONFIG_REGISTRY: # reused from ci env
+        FOO: bar
       annotation:
         org.opencontainers.image.title: Buildctl WoodpeckerCI Plugin
         org.opencontainers.image.description: A WoodpeckerCI plugin for buildctl to build container images using a remote builtkitd instance.