diff --git a/Dockerfile b/Dockerfile
index cb2974f..8806528 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM rust:1-alpine as builder
 
-RUN rustup default stable
+RUN rustup default stable-x86_64-unknown-linux-musl
 RUN apk add --no-cache musl-dev openssl-dev openssl-libs-static pkgconf git
 
 # Set `SYSROOT` to a dummy path (default is /usr) because pkg-config-rs *always*