Follow your distribution. For example Arch Linux provides PKGBUILDs for official repos and AUR. Most of the time someone has already published PKGBUILD, but if

Follow your distribution. For example Arch Linux provides PKGBUILDs for official repos and AUR. Most of the time someone has already published PKGBUILD, but if not I just patch accordingly. And conditions that formed separation are long gone, Arch Linux symlinks most of it: /bin -> /usr/bin /sbin -> /usr/bin /usr/sbin -> /usr/bin /lib -> /usr/lib /lib64 -> /usr/lib /usr/lib64 -> /usr/lib