[Nix-dev] OpenGL now available on Darwin

[Peter Simons]

Hi guys,

Nixpkgs now supports the native OpenGL implementation on Darwin through the
attribute 'darwinX11AndOpenGL'. Furthermore, the attributes 'x11', 'mesa',
and 'freeglut' automatically switch to the native implementation when
building on Darwin. This change allows us to build many OpenGL-related
applications just fine -- the Haskell Platform in particular.

Thanks a lot to Aristid Breitkreuz for helping to make all that happen.

Take care,
Peter