Most tools dedicated to system administration of local area network follow the same scheme. For each host they install an initial operating system and then update it using a package manager. The package managers run independently on the hosts, this makes difficult (even impossible) to create and maintain a stable environment in which multiple hosts coexist and cooperate. Furthermore, over time, the update process that upgrades, adds or suppress software results in instability of host systems. Finally, a package corresponds most often to a single software with a basic configuration which does not match to the network requirements. This article presents the YaKa framework which propose an orthogonal approach to this scheme in which the update feature almost disappears and is replaced by a very fast installation of a new clean system. All systems required in the network are generated all together by a compiler which has a complete view of the network. This general view allows to describe systems as a set of abstract services. A service groups one or several softwares and configures them for enabling a given functionality on one or several hosts.