How to get the "Loss of Cabin Pressure" achievement?

I have tried this achievement twice now, arriving in sector 8 with 13% net oxygen, however the achievement doesn't trigger:

Achievement not unlocked

ship layout

Each time I only have two rooms pressurized, any time my doors are force closed due to hacking I simply cut the oxygen to the whole ship. What am I doing wrong?


On the FTL wiki page for the achievement it states:

ATTENTION: Achievement is currently bugged - you may not save & quit during the achievement run.

I'd assume that that is what's causing your problem, since it sounds like everything else you're doing is a-ok.