Pact Foundation

HI All, I am trying to setup proxy setting for PactPublish task in gradle like this 		
pact {

	publish {
		pactDirectory = "$buildDir/pacts/"
		pactBrokerUrl = 'URL'
		pactBrokerToken = 'Token'
		systemProperty("https.proxyHost", "<http://host.se|host.se>")
		systemProperty("https.proxyPort", "8080")
		systemProperty("https.proxyUsername", "UN")
		systemProperty("https.proxyPassword", "PWD")
		systemProperty("https.nonProxyHosts", "localhost|127.*|.*<http://something.net|something.net>|.*<http://something.net|something.net>")
	}
} But is not allowing me to do so ,  Have anyone setup proxy setup for the gradle task pactPublish ?