diff --git a/ci/s390x-linux-debug.sh b/ci/s390x-linux-debug.sh
index 2cb5fb3f7b046562844a1b28e2a1d66ba6dc63d5..57fcd977e55033a5736059a44be347cd2c56e64d 100755
--- a/ci/s390x-linux-debug.sh
+++ b/ci/s390x-linux-debug.sh
@@ -6,7 +6,7 @@ set -x
 set -e
 
 TARGET="s390x-linux-musl"
-MCPU="z15"
+MCPU="baseline"
 CACHE_BASENAME="zig+llvm+lld+clang-$TARGET-0.17.0-dev.203+073889523"
 PREFIX="$HOME/deps/$CACHE_BASENAME"
 ZIG="$PREFIX/bin/zig"
diff --git a/ci/s390x-linux-release.sh b/ci/s390x-linux-release.sh
index 3a0884a3089cf50f05d854fbf90ded4a794c381a..7ee0f0e0d8655509642106c9fac3a1a76159e7d5 100755
--- a/ci/s390x-linux-release.sh
+++ b/ci/s390x-linux-release.sh
@@ -6,7 +6,7 @@ set -x
 set -e
 
 TARGET="s390x-linux-musl"
-MCPU="z15"
+MCPU="baseline"
 CACHE_BASENAME="zig+llvm+lld+clang-$TARGET-0.17.0-dev.203+073889523"
 PREFIX="$HOME/deps/$CACHE_BASENAME"
 ZIG="$PREFIX/bin/zig"