Windows dependency on separate server

In my build.gradle I have the following:

dependencies {
compile files (‘R:/JavaLib/jars/mail.jar’,
‘R:/JavaLib/jars/activation.jar’,
‘R:/JavaLib/jars/logback-core-1.1.2.jar’,
‘R:/JavaLib/jars/logback-classic-1.1.2.jar’)

In my windows environment how do I define a dependency that is on a separate server that I would normally specify as:
"\\serverXYZ\dir\library\abc.jar"