SubMaster Action: Applied by fake On Patch [2006042323230621799]: Stefan Fiedler: linux: since we use linux-libc-headers, ROCKCFG_PKG_LINUX_HEADERS is undefined, resulting in a missing usr/src/linux symlink. Thanks to Florin Muntean for noting! -- https://www.rocklinux.net/submaster/?mode=patch&uid=2006042323230621799