I tried this again (with the patch) and it builds now: $ guix package -i guile-emacs
The following package will be installed: guile-emacs 20150512.41120e0 /gnu/store/3vdzl2kav2m1nqv6raw0mgh0ak2v9qra-guile-emacs-20150512.41120e0 But it doesn't run: $ emacs Uncaught exception: Throw to key system-error with args ("load-thunk-from-memory" "~A" ("No such file or directory") (2))Threads explicit registering is not previously enabled Aborted