sources.list
deb-src *ringserver-URI/archives/linus/debian/debian sid main contrib non-free
get emacs-snapshot source
apt-get source emacs-snapshot
get compile environments
apt-get build-dep emacs-snapshot
configuring
mkdir /usr/local/emacs-current cd *SRC-DIR ./configure --prefix=/usr/local/emacs-current make bootstrap #It means compiling emacs-current and bite-compile elisp files