From: Jan Stancek on gitlab.com https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2255#note_1248824...
vmlinux_decompressor is already defined only on s390x, so it should be enough to let it expand to empty string otherwise: ``` - if [ -n "%{vmlinux_decompressor}" ]; then + if [ -n "%{?vmlinux_decompressor}" ]; then
```