The mainline go will not compile syscall after the last post-weekly tag due to the mmap support.
Russ wrote he'll look into it next week.

I try to maintain the bitbucket patch que with CLs still being reviewed (Anthony's time changes for example) so people can test them as a whole.

There is no need for two different GOBINs, the same 8g/8l you built for eg. Linux are able to produce Linux ELFs and Plan 9 a.out simply by changing to GOOS environment variable.

Pavel