I had to get Mercurial from here, that was successful then for this step:
$ hg clone -u release https://go.googlecode.com/hg/ go
$ sudo /usr/sbin/chown -R johayek go
./all.bash expects “sysctl” on PATH, so:
$ export PATH=$PATH:/usr/sbin
I ended up with applying sudo on ./all.bash, but still
$ sudo ./all.bash
I experienced problems before we a messed Xcode set-up, but after cleaning that up, everything was fine here.