bug#47115: Failure building grub-img.png when reconfiguring

[Jack Hill <jackhill@jackhill.us>]

[-- Attachment #1: Type: text/plain, Size: 914 bytes --]

I believe that I have identified the problematic difference in my 
operating system config between my working and non-working hosts. After 
applying the following patch to my operating system config (good and bad 
versions attatched), I was able to successfully reconfigure with guix 
8ec0ca8faff62f19426f22aeb1bd59a8950ca05a (I was able to reproduce the 
failure with that commit on another VM):

--- bad.scm	2021-03-15 22:36:36.000000001 -0400
+++ good.scm	2021-03-15 22:37:01.000000001 -0400
@@ -79,8 +79,6 @@
  			   (guix-service-type config =>
  					      (guix-configuration
  					       (inherit config)
-					       (extra-options
-						'("--disable-deduplication"))
  					       (authorized-keys
  						(cons
  						 (local-file "/home/jackhill/alperton-guix-key.pub")

I am forced to conclude that running the guix-daemon with deduplication 
disabled causes this build failure. Spooky!

Best,
Jack

[-- Attachment #2: Type: text/plain, Size: 2966 bytes --]

;; This is an operating system configuration for a VM image.
;; Modify it as you see fit and instantiate the changes by running:
;;
;;   guix system reconfigure /etc/config.scm
;;

(use-modules (gnu) (guix))
(use-service-modules networking ssh)
(use-package-modules bootloaders certs linux
                     package-management)

(define vm-image-motd (plain-file "motd" "
\x1b[1;37mThis is the GNU system.  Welcome!\x1b[0m

This instance of Guix is a template for virtualized environments.
You can reconfigure the whole system by adjusting /etc/config.scm
and running:

  guix system reconfigure /etc/config.scm

Run '\x1b[1;37minfo guix\x1b[0m' to browse documentation.

\x1b[1;33mConsider setting a password for the 'root' and 'guest' \
accounts.\x1b[0m
"))

(operating-system
 (host-name "kalessin")
 (timezone "America/New_York")
 (locale "en_US.utf8")
 (initrd-modules (cons "virtio_scsi" %base-initrd-modules))

 ;; Label for the GRUB boot menu.
 (label (string-append "GNU Guix " (package-version guix)))

 (firmware '())

 ;; Below we assume /dev/vda is the VM's hard disk.
 ;; Adjust as needed.
 (bootloader (bootloader-configuration
              (bootloader grub-bootloader)
              (target "/dev/vda")
              (terminal-outputs '(console))))
 (file-systems (cons (file-system
                      (mount-point "/")
                      (device (file-system-label "kalessin-btrfs"))
                      (type "btrfs")
		      (options "compress=zstd"))
                     %base-file-systems))

 (users (cons* (user-account
                (name "jackhill")
                (comment "Jack Hill")
                (group "users")
                (supplementary-groups '("wheel" "netdev")))
               %base-user-accounts))

 ;; Our /etc/sudoers file.  Since 'guest' initially has an empty password,
 ;; allow for password-less sudo.
 (sudoers-file (plain-file "sudoers" "\
root ALL=(ALL) ALL
%wheel ALL=NOPASSWD: ALL\n"))

 (packages (append (list btrfs-progs nss-certs)
                   %base-packages))

 (services
  (append (list (service openssh-service-type
			 (openssh-configuration
			  (password-authentication? #f)
			  (authorized-keys
			   `(("jackhill" ,(local-file "/id_ed25519.pub")
                                         ,(local-file "/home/jackhill/tamago.ssh-key")
                                         ,(local-file "/home/jackhill/id_ed25519.pub"))))))

                ;; Use the DHCP client service rather than NetworkManager.
                (service dhcp-client-service-type))
	  (modify-services %base-services
			   (guix-service-type config =>
					      (guix-configuration
					       (inherit config)
					       (extra-options
						'("--disable-deduplication"))
					       (authorized-keys
						(cons
						 (local-file "/home/jackhill/alperton-guix-key.pub")
						 %default-authorized-guix-keys))))))))

[-- Attachment #3: Type: text/plain, Size: 2901 bytes --]

;; This is an operating system configuration for a VM image.
;; Modify it as you see fit and instantiate the changes by running:
;;
;;   guix system reconfigure /etc/config.scm
;;

(use-modules (gnu) (guix))
(use-service-modules networking ssh)
(use-package-modules bootloaders certs linux
                     package-management)

(define vm-image-motd (plain-file "motd" "
\x1b[1;37mThis is the GNU system.  Welcome!\x1b[0m

This instance of Guix is a template for virtualized environments.
You can reconfigure the whole system by adjusting /etc/config.scm
and running:

  guix system reconfigure /etc/config.scm

Run '\x1b[1;37minfo guix\x1b[0m' to browse documentation.

\x1b[1;33mConsider setting a password for the 'root' and 'guest' \
accounts.\x1b[0m
"))

(operating-system
 (host-name "kalessin")
 (timezone "America/New_York")
 (locale "en_US.utf8")
 (initrd-modules (cons "virtio_scsi" %base-initrd-modules))

 ;; Label for the GRUB boot menu.
 (label (string-append "GNU Guix " (package-version guix)))

 (firmware '())

 ;; Below we assume /dev/vda is the VM's hard disk.
 ;; Adjust as needed.
 (bootloader (bootloader-configuration
              (bootloader grub-bootloader)
              (target "/dev/vda")
              (terminal-outputs '(console))))
 (file-systems (cons (file-system
                      (mount-point "/")
                      (device (file-system-label "kalessin-btrfs"))
                      (type "btrfs")
		      (options "compress=zstd"))
                     %base-file-systems))

 (users (cons* (user-account
                (name "jackhill")
                (comment "Jack Hill")
                (group "users")
                (supplementary-groups '("wheel" "netdev")))
               %base-user-accounts))

 ;; Our /etc/sudoers file.  Since 'guest' initially has an empty password,
 ;; allow for password-less sudo.
 (sudoers-file (plain-file "sudoers" "\
root ALL=(ALL) ALL
%wheel ALL=NOPASSWD: ALL\n"))

 (packages (append (list btrfs-progs nss-certs)
                   %base-packages))

 (services
  (append (list (service openssh-service-type
			 (openssh-configuration
			  (password-authentication? #f)
			  (authorized-keys
			   `(("jackhill" ,(local-file "/id_ed25519.pub")
                                         ,(local-file "/home/jackhill/tamago.ssh-key")
                                         ,(local-file "/home/jackhill/id_ed25519.pub"))))))

                ;; Use the DHCP client service rather than NetworkManager.
                (service dhcp-client-service-type))
	  (modify-services %base-services
			   (guix-service-type config =>
					      (guix-configuration
					       (inherit config)
					       (authorized-keys
						(cons
						 (local-file "/home/jackhill/alperton-guix-key.pub")
						 %default-authorized-guix-keys))))))))