From: Herton R. Krzesinski on gitlab.com https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2254#note_1248025...
Do you really need an external script here? I think you can use -n argument of xargs, eg:
```find $RPM_BUILD_ROOT/lib/modules/ -type f -name '*.ko' | xargs -n 1 -P${RPM_BUILD_NCPUS} -r xz; ```