Mark H Weaver <mhw@netris.org> skribis:

> In guix/build/install.scm:
>   47: 1 [install-grub # "/dev/sda" "/"]
> In unknown file:
>    ?: 0 [copy-file # "//boot/grub/grub.cfg.new"]
>
> ERROR: In procedure copy-file:
> ERROR: Wrong type (expecting string): #<derivation /gnu/store/ynkp0ijahvg4x1q6bfdw34d28hhqmgb4-grub.cfg.drv => /gnu/store/6qwr8shknwlb1f1l0a7j6n3h8sg36bv7-grub.cfg b7ecf78>

Oops, should be much better with this: