To use this repo you can call guix like
GUIX_PACKAGE_PATH="/path/to/pkgs" guix package -i php
or
guix package -L "/path/to/pkgs" -i php
In same manner you can install service with
guix system -L "/path/to/pkgs" reconfigure /path/to/system-config-with-new-services.scm
Php package for now is quite usable. It can builds and pass php tests. For now php compiles with fpm and with build-in pdo-pgsql. This config selected because GuixSD for now have services for nginx and postgresql.
Next step is creating service for php-fpm and correct config for nginx.