bug#69319: Unbootable, unfixable system

[Nathan Dehnel <ncdehnel@gmail.com>]

This config results in grub rescue "unknown filesystem <uuid of my
btrfs rootfs>" when I try to boot it. I have verified that all the
device uuids are correct, and the bootloader, mapped-devices, and
file-systems sections are identical in form to my other system which
boots fine. i can mount the boot partition and unlock and mount the
root partition manually, so they're not broken. I have no idea why
it's not working. My guess is that reconfigure is broken inside a
chroot somehow.

(use-modules (gnu))
(use-service-modules networking ssh sysctl shepherd base)
(use-package-modules vpn linux)
(use-modules (nongnu packages linux)
            (nongnu system linux-initrd)
            (gnu services)
            (guix packages)
            (gooby-channel packages baksnapper))
(define bashrc
   (local-file "../bashrc"))
(define nanorc
   (local-file "../nano/nanorc"))
(operating-system
(kernel linux)
 (initrd microcode-initrd)
 (firmware (list linux-firmware))
 (locale "en_US.utf8")
 (timezone "America/Chicago")
 (keyboard-layout (keyboard-layout "us"))
 (host-name "guixoffline")
 (bootloader
   (bootloader-configuration
     (bootloader grub-efi-bootloader)
       (targets '("/boot/efi1"))
     (keyboard-layout keyboard-layout)))
 (mapped-devices
   (list (mapped-device
           (source
             (uuid "14930dad-016d-4b59-b7d8-d5af2c33f4b0"))
           (target "offline1")
           (type luks-device-mapping))
))
 (file-systems
   (cons* (file-system
            (mount-point "/boot/efi1")
            (device (uuid "3339-DAE2" 'fat32))
            (type "vfat"))
          (file-system
            (mount-point "/")
            (device "/dev/mapper/offline1")
            (type "btrfs")
            (options "compress=zlib:9")
            (dependencies mapped-devices))
          %base-file-systems))
 (users (cons* (user-account
                 (name "nathan")
                 (comment "Nathan Dehnel")
                 (group "users")
                 (home-directory "/home/nathan")
                 (supplementary-groups '("wheel" "netdev" "audio" "video")))
               %base-user-accounts))
 (packages
   (append
           (specification->package "btrfs-progs")
           (specification->package "parted")
           (specification->package "mdadm")
           (specification->package "git")
           (specification->package "nss-certs")
           (specification->package "nix")
           (specification->package "efibootmgr")
           (specification->package "smartmontools")
           (specification->package "iotop")
           (specification->package "bcache-tools")
           (specification->package "lsof")
           (specification->package "wireguard-tools")
           (specification->package "baksnapper")
           (specification->package "file")
           (specification->package "rsync"))
     %base-packages))
 (services
   (append
     (list
          (service openssh-service-type
            (openssh-configuration
             (permit-root-login #t)
             (password-authentication? #t)
             (authorized-keys
              `(("root" ,(local-file "ssh/root-gentoodesktop.pub"))
                ("root" ,(local-file "ssh/baksnapper-gentoodesktop.pub"))
                ("root" ,(local-file "ssh/baksnapper-gentooserver.pub"))
                ("root" ,(local-file "ssh/nathan-guixlaptop.pub"))
))))
           (service connman-service-type)
           (service ntp-service-type)
           (service gpm-service-type)
           (simple-service 'nanorc etc-service-type
                       (list `("nanorc", nanorc)))
)
       %base-services)))