diff --git a/Dockerfile b/Dockerfile
index 4220708..101108c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,7 @@ RUN \
     echo "${MIRROR}/${REL}/main"; \
     echo "${MIRROR}/${REL}/community"; \
   } > "${ROOTFS}/etc/apk/repositories" && \
-  apk --root "${ROOTFS}" --no-cache --keys-dir /etc/apk/keys add --arch ${ALPINE_ARCH} --initdb ${PACKAGES//,/ } && \
+  apk --root "${ROOTFS}" --no-cache --keys-dir /etc/apk/keys add --arch ${ARCH} --initdb ${PACKAGES//,/ } && \
   sed -i -e 's/^root::/root:!:/' /root-out/etc/shadow
 
 # add s6 overlay