Drop slash prefix on generated templateCache keys

Getting this outcome from the API, alone, is currently not possible, which is why I touched the source code. For UI Router, in the templateUrl key, I'm trying to address templates like this: 'moduleName/templateName.tpl.html'. To do this, I'm using gulp-rename and, in the path.dirname, I'm grabbing its parent module's folder name. Once this string is piped to angular-templatecache, an additional slash is prefixed to the beginning, even when, in the options hash, I set root and base to empty strings. So in the $templateCache, the template names are formed like this: '/moduleName/templateName.tpl.html' (with that additional undesired slash at the beginning).

Am I misusing the API somehow? Send your thoughts, please.