diff --git a/cross/Dockerfile b/cross/Dockerfile
index e0a876d86..18840f143 100644
--- a/cross/Dockerfile
+++ b/cross/Dockerfile
@@ -1,5 +1,4 @@
-ARG CROSS_BASE_IMAGE
-FROM $CROSS_BASE_IMAGE
+FROM ghcr.io/cross-rs/aarch64-unknown-linux-musl@sha256:7ad32efcae37c178fed63da301ff982d2430f15fc7d39e6c0b28124e14fac394
 
 RUN --mount=type=bind,source=/,target=/polyfill /polyfill/polyfill.sh