On my system building grub fails because grub-image.png fails.
Generation 541 18. April 2021 00:12:22 (aktuell)
Commit: 84feaca4888c9916e1a97bb81e5d157673488b70
# guix system reconfigure -k /etc/config.scm
LANG=C guix system reconfigure -k /etc/config.scm
guix system: warning: cannot determine provenance for current system
guix system: warning: the following groups appear more than once: scanner cdrom
guix system: warning: the following groups appear more than once: scanner cdrom
The following derivations will be built:
/gnu/store/3w6l9jhdbhgknkd1grx4fz1bg9y58nj5-grub.cfg.drv
/gnu/store/lna5wrbqzdzmplbxdz96mkqbx32v124r-grub-image.png.drv
building /gnu/store/lna5wrbqzdzmplbxdz96mkqbx32v124r-grub-image.png.drv...
\builder for `/gnu/store/lna5wrbqzdzmplbxdz96mkqbx32v124r-grub-image.png.drv' failed with exit code 1
build of /gnu/store/lna5wrbqzdzmplbxdz96mkqbx32v124r-grub-image.png.drv failed
View build log at '/var/log/guix/drvs/ln/a5wrbqzdzmplbxdz96mkqbx32v124r-grub-image.png.drv.bz2'.
cannot build derivation `/gnu/store/3w6l9jhdbhgknkd1grx4fz1bg9y58nj5-grub.cfg.drv': 1 dependencies couldn't be built
guix system: error: build of `/gnu/store/3w6l9jhdbhgknkd1grx4fz1bg9y58nj5-grub.cfg.drv' failed
# emacs -Q /var/log/guix/drvs/ln/a5wrbqzdzmplbxdz96mkqbx32v124r-grub-image.png.drv.bz2
2 (primitive-load "/gnu/store/larqpc2wjhnc6jmj4885k8lynd1?")
53:6 1 (svg->png _ "/gnu/store/0f2bpqpgflza414sk0hwms3rdizg1x?" ?)
0 (rsvg-handle-render-cairo #<rsvg-handle 7ffff0b56280> #)
ERROR: In procedure rsvg-handle-render-cairo:
Wrong type (expecting finalized smob): #<cairo-context 7ffff0b561c0>