From Debian Wheezy to Devuan
This is the PATH to kick the systemd shit our of your system!
Update / Upgrade your Wheezy box
apt-get update apt-get upgrade
Remove Debian repo's and add Devuan's
asbesto@zaverio:~$ cat /etc/apt/sources.list # main sources #deb http://cdn.debian.net/debian/ wheezy main contrib non-free #deb-src http://cdn.debian.net/debian/ wheezy main contrib non-free # security #deb http://cdn.debian.net/debian-security/ wheezy/updates main contrib non-free #deb-src http://cdn.debian.net/debian-security/ wheezy/updates main contrib non-free #deb http://ftp.us.debian.org/debian wheezy main contrib non-free #deb-src http://ftp.us.debian.org/debian wheezy main contrib non-free #deb http://security.debian.org/ wheezy/updates main contrib non-free #deb-src http://security.debian.org/ wheezy/updates main contrib non-free # deb http://packages.devuan.org/merged/ jessie main deb http://packages.devuan.org/merged/ jessie main non-free contrib deb-src http://packages.devuan.org/merged/ jessie main non-free contrib # jessie-security, previously known as 'volatile' deb http://packages.devuan.org/merged/ jessie-security main contrib non-free deb-src http://packages.devuan.org/merged/ jessie-security main contrib non-free # jessie-updates, previously known as 'volatile' deb http://packages.devuan.org/merged/ jessie-updates main contrib non-free deb-src http://packages.devuan.org/merged/ jessie-updates main contrib non-free asbesto@zaverio:~$
Update and download Devuan keyring
apt-get update apt-get instal devuan-keyring apt-get update
Dist-upgrade the machine!
apt-get dist-upgrade
Reboot, et voila
reboot
Enjoy your Devuan! 
Tnx to Jaromil, Franco Lanza -- Asbesto