I try PhoneGap Build service to create package for my Javascript application (in fact it is demo from PhoneJS distribution), but the package does not install to my Nokia Lumia device.
How do you build your PhoneGap applications for Windows Phone 8?
You may also use the standard PhoneGap approach to building Windows Phone 8 packages. It is described in the Getting Started with Windows Phone 8 article at Cordova site.
(however this also implies that you have Visual Studio installed, and WP8 SDK)