Some packages that require a lot of space will do a pre-merge free space check (eg libreoffice, chromium) with 'check-reqs_pkg_setup' tensorflow[python] also requires a lot of free space but does not perform this check which causes nuisance build failures after long compile times. This bug is to request that we add this check to the tensorflow ebuild - it peaked at 19.2G (20116120k) for me.
How many python_targets do you have enabled? TensorFlow used to check for 5GB, that probably isnt enough anymore. My /var/tmp is only 16G tho and it builds fine for 1 python target. I'm making it do 5G + 5G * number of python targets enabled. lets see if thats enough.
Yeah I have 3 python targets here, so checking for 5+5n will do the job.