FalconCLIException while submitting trusted extension job

richie.varghese@falcon1001:~$ falcon extension -submit -jobName job1 -file trust  -extensionName hdfs-mirroring
Error in building the extension:org.apache.falcon.client.FalconCLIException: The extension build time jars do not contain META-INF/services/org.apache.falcon.extensions.ExtensionBuilder
	at org.apache.falcon.ExtensionHandler.prepare(ExtensionHandler.java:114)
	at org.apache.falcon.ExtensionHandler.loadAndPrepare(ExtensionHandler.java:105)
	at org.apache.falcon.client.FalconClient.getEntities(FalconClient.java:1174)
	at org.apache.falcon.client.FalconClient.validateExtensionAndGetEntities(FalconClient.java:1140)
	at org.apache.falcon.client.FalconClient.getEntitiesForm(FalconClient.java:1109)
	at org.apache.falcon.client.FalconClient.submitExtensionJob(FalconClient.java:1098)
	at org.apache.falcon.cli.FalconExtensionCLI.extensionCommand(FalconExtensionCLI.java:116)
	at org.apache.falcon.cli.FalconCLI.run(FalconCLI.java:128)
	at org.apache.falcon.cli.FalconCLI.main(FalconCLI.java:62)

ERROR: Error in building the extension:The extension build time jars do not contain META-INF/services/org.apache.falcon.extensions.ExtensionBuilder