I'm learning that when I describe how to build some piece of software, I should always wait a week and then try and build something using only my notes. One thing that I'd left out of the build howto for FiSH was what to do with "blow.ini". Put it in ~/.xchat2.
BTW, I've also built a 32-bit version. The only difference in the build is that you'll use "make" instead of "make amd64".