Go back to upstream nixpkgs #57

	name: "Build and test kernel"
	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]
	types: [opened, synchronize, reopened] # trigger on PRs
	workflow_dispatch:

	jobs:
	build:
	name: Build kernel
	runs-on:
	group: aws-g6-12xlarge-plus
	steps:
	- uses: actions/checkout@v4
	- uses: cachix/install-nix-action@v27
	with:
	nix_path: nixpkgs=channel:nixos-unstable
	- uses: cachix/cachix-action@v14
	with:
	name: kernel-builder
	authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
	env:
	USER: github_runner
	- name: Build activation kernel
	run: ( cd examples/activation && nix build .\#redistributable.torch25-cxx98-cu121-x86_64-linux )
	- name: Copy activation kernel
	run: cp -rL examples/activation/result activation-kernel

	- name: Build cutlass GEMM kernel
	run: ( cd examples/cutlass-gemm && nix build .\#redistributable.torch25-cxx98-cu121-x86_64-linux )
	- name: Copy cutlass GEMM kernel
	run: cp -rL examples/cutlass-gemm/result cutlass-gemm-kernel

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	- name: Build Docker image
	uses: docker/build-push-action@v5
	with:
	context: .
	file: tests/Dockerfile.test-kernel
	platforms: linux/amd64
	load: true
	push: false
	tags: kernel-builder:latest

	- name: Run Tests
	run: \|
	docker run --gpus all kernel-builder:latest

Provide feedback