Is it possible to have a
package manager(in my case
Not just compiling it will it work?
Once you install a package manager and begin to use it (plus repos), lfs basically ceases to be lfs and becomes the distro using that package manager and repos. What here is your goal in using lfs? If you want special self-built packages/kernel, you may as well install arch linux and then build those packages with makepkg and/or write your own PKGBUILD for those packages not in the default repos.