Unable to Build nixGLIntel on NixOS

[georgewsinger]

Attempting to compile in NixOS:

The command used to build:

NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-build ./default.nix -A nixGLIntel --arg pkgs "import /home/george/Simula/pinned-nixpkgs.nix {}"

The NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 is likely the issue, but I added it because without I get:

I'm running against nixos-unstable with an nvidia card. My intended use case is to help a program usually runned with an nvidia driver run instead with software rendering.