With guix at revision df81e046c57e5f767738113e4e7a28b212c03d63 I deployed Guix to another partition. After booting into Guix I used slim to login into Ratpoison and I run there terminal emulator. `guix' wasn't available in current PATH settings so user couldn't maintain his profile. I believe that /run/current-system/profile/bin/ should be added to PATH.