[nodejs-plugin] Combine Download URL and install global package

[seb0uil]

Hi,

In my company we use nexus to provide mirror for some tools like nodejs or maven.
I try to configure my jenkins plugins to use these mirrors instead of original URL.
For maven plugin, I can use 'Extract *.zip/*.tar.gz', it's OK.
For nodeJS plugin, I can't combine downloading from my own url and install global npm packages, do i miss something, or do i need to update to plugin to use my mirror url ?

Thanks
--
Seb