$ paludis -pi compcomm --dl-reinstall-scm always
Building target list... 
Building dependency list...

These packages will be installed:

* x11-wm/compiz-9999::xeffects {:0} [R] dbus -fuse gnome gtk -kde svg <x11-libs/ccs-backend-gconf-9999::xeffects, x11-libs/ccs-lib-9999::xeffects, 4 more>
* x11-libs/bcop-9999::xeffects {:0} [R]  <x11-plugins/compcomm-plugins-extra-9999::xeffects, x11-plugins/compcomm-plugins-main-9999::xeffects>
* x11-plugins/compcomm-plugins-main-9999::xeffects {:0} [R]  <x11-wm/compcomm-9999-r2::xeffects>
* x11-plugins/compcomm-plugins-extra-9999::xeffects {:0} [R]  <x11-wm/compcomm-9999-r2::xeffects>
* x11-wm/emerald-9999::xeffects {:0} [R]  <x11-themes/emerald-themes-9999::xeffects, x11-wm/compcomm-9999-r2::xeffects>
* x11-themes/emerald-themes-9999::xeffects {:0} [R]  <x11-wm/emerald-9999::xeffects>
* x11-libs/ccs-lib-9999::xeffects {:0} [R]  <dev-python/ccs-python-9999::xeffects, x11-libs/ccs-backend-gconf-9999::xeffects>
* dev-python/ccs-python-9999::xeffects {:0} [R]  <x11-apps/ccsm-9999::xeffects>
* x11-apps/ccsm-9999::xeffects {:0} [R]  <x11-wm/compcomm-9999-r2::xeffects>
* x11-libs/ccs-backend-gconf-9999::xeffects {:0} [R]  <x11-wm/compcomm-9999-r2::xeffects>
* x11-wm/compcomm-9999-r2::xeffects {:0} [R] gnome -kde

Total: 11 packages (11 rebuilds)