Update .github/workflows/nix.yml: pin to the current commit #296

	name: Nix build

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build:
	permissions:
	contents: write
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 2

	- uses: DeterminateSystems/nix-installer-action@aacc1657a206483a9d7037b91370e00407cf3ec5
	with:
	determinate: true

	- name: Run build
	run: nix build

	- name: Fix hash mismatches
	if: failure() && github.event_name == 'pull_request'
	id: fix-hashes
	run: \|
	git stash --include-untracked
	git fetch --depth=1 origin "$GITHUB_HEAD_REF"
	git checkout -B "$GITHUB_HEAD_REF" "${{ github.event.pull_request.head.sha }}"

	determinate-nixd fix hashes --auto-apply

	if ! git diff --quiet; then
	git config user.name "github-actions[bot]"
	git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
	git add --update --ignore-removal .
	git commit -m "[dependabot skip] Automatically fix Nix hashes"
	git push origin "$GITHUB_HEAD_REF"
	fi

	git checkout -
	git stash pop \|\| true

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