deffer updating system after missing dependencies found

continuation of #1831 

- [ ] arch
- [ ] centos
- [ ] freebsd
- [ ] gentoo_paludis
- [ ] gentoo_pkgcore
- [ ] gentoo_portage
- [ ] openbsd
- [ ] openindiana
- [ ] opensuse
- [ ] osx_brew
- [ ] osx_fink
- [ ] osx_port
- [ ] smartos
- [ ] smf
- [ ] solaris
- [ ] ubuntu