Synergy plugin fails on the last step. Downgrading to 1.5 fixes the problem.

$ ccm attr -s owner -p Applications,build
[PROJECT] $ ccm attr -s owner -p Applications,build
build

FATAL: null
java.lang.NullPointerException
at hudson.plugins.synergy.impl.Commands.printCommandLine(Commands.java:288)
at hudson.plugins.synergy.impl.Commands.executeSynergyCommand(Commands.java:173)
at hudson.plugins.synergy.SynergySCM.generateChangeLog(SynergySCM.java:890)
at hudson.plugins.synergy.SynergySCM.checkoutDynamicProject(SynergySCM.java:597)
at hudson.plugins.synergy.SynergySCM.checkoutProject(SynergySCM.java:578)
at hudson.plugins.synergy.SynergySCM.checkout(SynergySCM.java:335)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1195)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:579)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:468)
at hudson.model.Run.run(Run.java:1408)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:238)