First time building the system from source (-stable) on #octeon. Started the process on Friday afternoon, expecting it to take a while. Was not expecting the build to still be going 2 days later... 
@scotttyb What machine? Also what kind of media?
@qbit EdgeRouter 6p, 4 cores, 1GB RAM. This machine is equipped with an extra USB slot on the front, so I got a 32GB flash drive for /usr/src and /usr/obj (because the internal MMC is only 4GB).
@scotttyb dang!

@qbit tell me about it! Last I checked though it was trying to churn through llvm. Thinking about skipping that one if the build is still going tonight.

Do you know if removing `usr.bin` from /usr/src/gnu/Makefile is enough to skip building llvm, clang, etc.? I know it's not supported, but IIRC the errata for 6.6 hasn't affect the gnu subtree.

@scotttyb does syspatch not work on octeon? It might be enough, I have never tried :D
@qbit I wish! But alas, mips64 does not get binary patches. I might be able to test my theory later and report back. Thanks though!

The answer to this question is, during the build new base system step:

# make obj

Comment out SUBDIR+= gnu in /usr/src/Makefile

# make build