remake-autogen-project fails with permission denied

[Leo Arias]

I'm trying to build unity and this lens from trunk.
Following the guid in http://unity.ubuntu.com/getinvolved/development/unity/ I have unity, nux and libunity working.
But when I do remake-autogen-project for the unity-lens-music project, I get the following errors:

make[2]: Nothing to be done for `install-exec-am'.
 /bin/mkdir -p '/usr/share/dbus-1/services'
 /usr/bin/install -c -m 644 unity-scope-music.service musicstore-scope.service music-preview-player.service '/usr/share/dbus-1/services'
/usr/bin/install: cannot remove ‘/usr/share/dbus-1/services/unity-scope-music.service’: Permission denied
/usr/bin/install: cannot remove ‘/usr/share/dbus-1/services/musicstore-scope.service’: Permission denied
/usr/bin/install: cannot remove ‘/usr/share/dbus-1/services/music-preview-player.service’: Permission denied
make[2]: *** [install-dbus_servicesDATA] Error 1
make[2]: Leaving directory `/home/ubuntu/workspace/unity-lens-music/libunity7-compatible/data'
make[1]: *** [install-am] Error 2
make[1]: Leaving directory `/home/ubuntu/workspace/unity-lens-music/libunity7-compatible/data'
make: *** [install-recursive] Error 1

This should just install the lens on the staging prefix, where all the other components are. So it shouldn't do anything with my /usr/share/dbus folders.