diff --git a/script/setup-musl b/script/setup-musl
index 6de3a11cb..ad0550645 100755
--- a/script/setup-musl
+++ b/script/setup-musl
@@ -20,11 +20,12 @@ fi
 apt-get update -y && apt-get install musl-tools -y
 
 ZLIB_VERSION="1.2.11"
+ZLIB_SHA256="c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1"
 
-curl -O -sL "https://www.zlib.net/fossils/zlib-${ZLIB_VERSION}.tar.gz"
+# stable archive path
+curl -O -sL --fail --show-error "https://zlib.net/fossils/zlib-${ZLIB_VERSION}.tar.gz"
 
-echo "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1 zlib-${ZLIB_VERSION}.tar.gz" |
-    sha256sum --check
+echo "${ZLIB_SHA256} zlib-${ZLIB_VERSION}.tar.gz" | sha256sum --check
 tar xf "zlib-${ZLIB_VERSION}.tar.gz"
 
 arch=${BABASHKA_ARCH:-"x86_64"}