About the failing test below, lzip is not found on armhf and all tests
are skipped but the last one, that fails.

The patch attached, makes sure that this test is also skipped if lzip is
not found.

Now I'm not sure why it is not found but that's another matter.

WDYT?

Mathieu

> --8<---------------cut here---------------start------------->8---
> test-name: make-lzip-input-port/compressed
> location: /tmp/guix-build-guix-1.0.1-10.41b4b71.drv-0/source/tests/lzlib.scm:111
> source:
> + (test-assert
> +   "make-lzip-input-port/compressed"
> +   (let* ((len (pk 'len (+ 10 (random 4000 %seed))))
> +          (data (random-bytevector len))
> +          (compressed
> +            (make-lzip-input-port/compressed
> +              (open-bytevector-input-port data)))
> +          (result
> +            (call-with-lzip-input-port
> +              compressed
> +              get-bytevector-all)))
> +     (pk (bytevector-length result)
> +         (bytevector-length data))
> +     random seed for tests: 1574602043
> (bytevector=? result data)))
>
> ;;; (len 3501)
> actual-value: #f
> actual-error:
> + (wrong-type-arg
> +   #f
> +   "Wrong type to apply: ~S"
> +   (#f)
> +   (#f))
> result: FAIL