Rutger Helling <rhelling@mykolab.com> writes:

> I've made one more change. In the Mesa 17.3.x series S3TC compression is
> now built-in (the patent expired). This means the s2tc input is now
> unnecessary, so I've removed it.
>
> I confirmed with guix gc --references $(guix build mesa) that there
> wasn't a reference to s2tc anymore that was in 17.2.x.

Thanks for the attention to detail here.  The patch LGTM!