util-vserver-URL1 := http://build.planet-lab.org/third-party/$(util-vserver)
util-vserver-URL2 := http://mirror.onelab.eu/third-party/$(util-vserver)
util-vserver-URL1 := http://build.planet-lab.org/third-party/$(util-vserver)
util-vserver-URL2 := http://mirror.onelab.eu/third-party/$(util-vserver)