Hi, I'm not sure if I understand what the OP tries to achieve. I install "linux" and "linux-rt-lts" from repositories, but build "linux-rt" myself. To keep different versions of "linux-rt 4.19, I add an extension, "cornflower", "pussytoes" or "securityink". I misuse pkgrel to inform me if CONFIG_HZ is 1000 or 300. $ pacman -Q linux{,-rt{-lts,,-cornflower,-pussytoes,-securityink}}|awk '{print $1"\t"$2}' linux 6.2.7.arch1-1 linux-rt-lts 5.15.96.61.realtime1-1 linux-rt 1:4.19.277_rt122-0.1000 linux-rt-cornflower 1:4.19.271_rt120-0.300 linux-rt-pussytoes 1:4.19.269_rt119-0.300 linux-rt-securityink 1:4.19.265_rt117-0.300 IOW we can not install 2 different "linux", but we can install "linux-foo" and "Linux-bar", if we don't want to follow the approach of some other distros, that don't name the kernels "vmlinuz-linux", but "vmlinuz-4.5.6-7", so by this approach there is the need to edit the bootloader config or to change links each time a kernel gets updated. Regards, Ralf