@abbradar, thanks for your PR! By analyzing the history of the files in this pull request, we identified @corngood, @vcunat and @wkennington to be potential reviewers.

Hmm, if we want to open path for the future option, better set this to true only in mesa_drivers.

I think this is a good step for now.

Do we have any examples of things that are left to user choice, but are built in multiple configurations to the binary cache? We could have some sort of global patent flag similar to the unfree one, except both versions would go in the cache. Would we just have to add mesa_drivers_nopatent to all-packages?

I thought to change this according to @vcunat's comment but it shouldn't be a problem anyway if this flag has no effect on core Mesa.

@corngood: attributes in all-packages.nix are the main place, but we only do this for leaf packages. For fontconfig, for example, we can't afford to build the whole reverse closure twice. (One could do some hacky replacing, etc. but I don't like that.)

I have no idea if the patent risk applies to running the code or to having it on your drive or what... (or even if this is in libGL or where)

@vcunat Not a lawyer too. Well, we can just make a more accurate patch during next Mesa update.

I'm just about to update it ;-)

See 328bcda

I wonder whether to backport this to 17.03... yes?

I guess so, done in 0c06c48.