I'm running the GuixSD usb install image version 0.9.0. I booted into the install environment, and after connecting to the internet I ran "guix pull". After "guix pull", I prepared the system to install to hard drive, then I ran "guix system init /mnt/etc/config.scm /mnt --fallback".
The build failed with the error message "Suspicious ownership or permission on /gnu/store/...-harfbuzz-1.0.6-bin". mark_weaver on the IRC channel asked me to run the stat command on that directory, so I ran "stat /gnu/store/...-harfbuzz-1.0.6-bin" (but with the actual string of alphanumeric characters in place of the ellipsis). The stat command indicated that the -harfbuzz-1.0.6-bin directory permissions is 0777. To be more specific: Access: (0777/drwxrwxrwx) Uid: (30001/guixbuilder01) Gid: (30000/guixbuild). Let me know if any more information is needed. -Jeffrey (hyperreal on IRC)