I've been emerging Apache using a command like "ROOT=/livecd emerge apache" and the user "apache" hasn't been making its way into the CD's passwd file. The system's passwd file is getting an "apache" user added so my conclusion is that the "enewuser" and "enewgroup" functions don't honor the ROOT environment variable.
Steps to Reproduce:
1. mkdir /livecd
2. ROOT=/livecd emerge apache
3. grep apache /livecd/etc/passwd
Nothing is found.
To have the user "apache".
*** This bug has been marked as a duplicate of bug 53269 ***