Re: [PATCH 3/5] gnu: qemu: Enable spice support.

[David Craven]

> Unfortunately, 'spice' only builds successfully on x86_64, so with this
> patch, i686 and armhf lose 'qemu'.

'usbredir' is needed by 'spice-gtk' which is only needed to run the tests
for spice. This can be fixed by removing the automated tests configure-flag
and removing spice-gtk from the dependencies on i686.

If supported-systems is set correctly, will guix try to build without
the required
package? This is useful in case the dependency is only optional.

Trying to build with guix build --system=armhf-linux tells me that I'm
x86-64-linux and the same for --system=mipsel-linux. It would be
nice if guix build would spin up a qemu instance in this case. It will
take me a while to test.