chore(deps): update cachix/install-nix-action action to v30 #128

	name: "Build System Configuration"
	on:
	pull_request:
	push:
	jobs:
	tests:
	runs-on: macos-14
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	- uses: cachix/install-nix-action@v30
	with:
	extra_nix_config: "access-tokens = github.com=${{ secrets.TOKEN }}"
	- name: install git-crypt on the runner via nix flakes
	run: nix profile install nixpkgs#git-crypt
	- name: provide and temporarily unlock secrets as preparation for nix build
	run: \|
	echo "$GIT_CRYPT_KEY" \| base64 -d > ./git-crypt-key && \
	git-crypt unlock ./git-crypt-key && \
	rm ./git-crypt-key
	env:
	GIT_CRYPT_KEY: ${{ secrets.GIT_CRYPT_KEY }}
	- name: create dirty git worktree to omit git-crypt errors with flakes
	run: echo " " >> flake.nix #
	- name: build darwinConfiguration for apple silicon
	run: nix build '.?submodules=1#darwinConfigurations.m1.system'
	- name: validate nix flake
	run: nix flake check

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