python3Packages.openai-triton: justify the use of pkgsTargetTarget

  version = "2.0.0";

  inherit (cudaPackages) cuda_cudart backendStdenv;

  # A time may come we'll want to be cross-friendly

  #

  # Short explanation: we need pkgsTargetTarget, because we use string

  # interpolation instead of buildInputs.

  #

  # Long explanation: OpenAI/triton downloads and vendors a copy of NVidia's

  # ptxas compiler. We're not running this ptxas on the build machine, but on

  # the user's machine, i.e. our Target platform. The second "Target" in

  # pkgsTargetTarget maybe doesn't matter, because ptxas compiles programs to

  # be executed on the GPU.

  # Cf. https://nixos.org/manual/nixpkgs/unstable/#sec-cross-infra

  ptxas = "${pkgsTargetTarget.cudaPackages.cuda_nvcc}/bin/ptxas";

  llvm = (llvmPackages.llvm.override {