Currently, there is a hard dependency that seems uneeded. modemmanager should probably be pulled-in with a USE flag or even just be considered as third party.
Confirming that I can install and use networkmanager-0.8.4.0-r1 without modemmanager.
Hi Mouni, Yes, you're right we've made ppp optional dependency and modemmanager should only be used with ppp use flag. I'll try to get it fixed today.
In the tree now.