bug#43760: cuirass: fail to install with simple configuration

[Mathieu Othacehe]

Hello Jonathan,

> ice-9/boot-9.scm:1669:16: In procedure raise-exception:
> Wrong type (expecting string): #f

Thanks for the bug report. This should be fixed with
d6a8f0a9781a90c3037f25e51d7ff32e50f7a8c1.

You will then probably hit this one:

https://issues.guix.gnu.org/43757

but we'll see that later :)

Thanks,

Mathieu