Make package build against distributed-process-0.7.4

[mcfilib]

I've been experimenting with distributed-process and found myself reaching for a process registry. Unfortunately this package doesn't build with distributed-process-0.7.4.

[hyperthunk]

Hmmm. What are the compilation errors? I haven't even got a dev environment set up at the moment, but I can start pulling one together and see if I can fix.