Hi.
If you can emerge an large package, and have some errors of Collisions or Blocked Packages, exists that a chance that these blockers are not essential.
For this, you may keep the compilation and installation running, "jumping" the erratic packages, until compilation-installation finished.
Use the option: Keep Going.
Credits do Zap Medico, one of the developers of Gentoo.
emerge --ask --verbose --keep-going name of the package
This works only for Portage versions after 19 (seems that 20 is the actual version).


