bug#44370: Cuirass fails building (some) packages from a custom-packages input

[Mathieu Othacehe]

Hello David,

> error: specifications->manifest: unbound variable

This error is caused by the evaluation of "packages/manifest.scm" that
misses some includes.

> guix/inferior.scm:247:2: ERROR:
>   1. &inferior-exception:
>       arguments: (quit 1)
>       inferior: #<<inferior> pid: pipe socket: #<input-output: string
>       7f1b3d1dabd0> close: #<procedure close-pipe (p)> version: (0 1 1) 
> packages: #<promise #<procedure 7f1b3d1de940 at guix/inferior.scm:162:32 ()>>
> table: #<promise #<procedure 7f1b46b3a780 at guix/inferior.scm:163:32 ()>>>
>       stack: ((#f ("ice-9/boot-9.scm" 1763 13)) (raise-exception
>       ("ice-9/boot-9.scm" 1666 16)) (raise-exception ("ice-9/boot-9.scm" 1668 
> 16)) (map1 ("srfi/srfi-1.scm" 585 17)) (map1 ("srfi/srfi-1.scm" 585 29)) (map1
> ("srfi/srfi-1.scm" 585 29)) (map1 ("srfi/srfi-1.scm" 585 29)) (map1
> ("srfi/srfi-1.scm" 585 29)) (map1 ("srfi/srfi-1.scm" 585 29)) (map1
> ("srfi/srfi-1.scm" 585 29)) (map1 ("srfi/srfi-1.scm" 585 29)) (map1
> ("srfi/srfi-1.scm" 585 29)) (#f ("gnu/ci.scm" 552 38)) (map1
> ("srfi/srfi-1.scm" 585 17)) (append-map ("srfi/srfi-1.scm" 672 15)) 
> (hydra-jobs ("gnu/ci.scm" 516 4)) (#f ("ice-9/eval.scm" 158 9)) (#f
> ("ice-9/eval.scm" 158 9)) (with-exception-handler ("ice-9/boot-9.scm" 
> 1735 10)) (call-with-prompt ("ice-9/boot-9.scm" 717 2)) (dynamic-wind
> ("ice-9/boot-9.scm" 141 2)) (#f (#f #f #f)) (#f ("guix/repl.scm" 92 21)) 
> (with-exception-handler ("ice-9/boot-9.scm" 1735 10)) (with-exception-handler
> ("ice-9/boot-9.scm" 1730 15)) (#f ("guix/repl.scm" 119 7)))

That one is caused by packages with "#f" licenses. I've pushed
7c02eb6c8d7d050ecb8f3082c4a754ad32211403 to ignore package licenses.

Thanks,

Mathieu