Why don't you try unpacking, but not fully installing, the binary package for your OS. For example, I looked in the releases dir and downloaded (with e.g. firefox, curl, or wget) the 64 bit rpm for my Fedora 22, into a newly created directory, myatom, then unpacked it with
cd myatom rpm2cpio x86_64.rpm | cpio -cid
and it seemed to work.