-ejabberd-URL := http://www.process-one.net/downloads/ejabberd/2.1.6/ejabberd-2.1.6.tar.gz
-ejabberd-SHA1SUM := a1afbfc270f8e4c945bd91f64b7073781590535b
-ejabberd := $(notdir $(ejabberd-URL))
+ejabberd-URL1 := http://mirror.onelab.eu/third-party/ejabberd-2.1.6.tar.gz
+ejabberd-URL2 := http://build.planet-lab.org/third-party/ejabberd-2.1.6.tar.gz
+ejabberd-SHA1SUM := a1afbfc270f8e4c945bd91f64b7073781590535b
+ejabberd := $(notdir $(ejabberd-URL1))