diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 54b7c33..5d0d592 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,7 +30,7 @@ stages:
   - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
   script:
   - docker pull $CI_REGISTRY_IMAGE:latest || true
-  - docker build --pull --cache-from $CI_REGISTRY_IMAGE:latest --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH . --file Dockerfile.ci
+  - docker build --pull --cache-from $CI_REGISTRY_IMAGE:latest --build-arg TARGETARCH=$DOCKER_ARCH --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH . --file Dockerfile.ci
   - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH
   - docker rmi $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH
 
diff --git a/Dockerfile b/Dockerfile
index eda3614..dd06613 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,8 +9,8 @@ RUN go build -o /usr/bin/mautrix-whatsapp
 
 FROM alpine:3.12
 
-ARG DOCKER_ARCH=amd64
-ARG YQ_DOWNLOAD_ADDR=https://github.com/mikefarah/yq/releases/download/3.3.2/yq_linux_${DOCKER_ARCH}
+ARG TARGETARCH=amd64
+ARG YQ_DOWNLOAD_ADDR=https://github.com/mikefarah/yq/releases/download/3.3.2/yq_linux_${TARGETARCH}
 
 ENV UID=1337 \
     GID=1337