Gentoo

Gentoo is a source distribution, very efficient and well done, with a very good documentation and community.

ebuild fluxbox fetch   ; to download the package
ebuild fluxbox unpack  ; to uncompress the sources
; here you can modify sources
ebuild fluxbox compile ; to compile
ebuild fluxbox install ; to install (first part)
ebuild fluxbox qmerge  ; to install (second part)
ebuild fluxbox clean   ; to clean temporary folders

This is exactly equivalent to :

emerge fluxbox