yep, more dotfiles

Revert "fix: remove deleted cachix" (partial)

This reverts commit 8f9d5d41ad27613922986196d37cf4cf8e2dd133.

Changed files
+4
.github
workflows
+4
.github/workflows/nix.yml
···
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
+
- uses: cachix/install-nix-action@v31
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with:
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github_access_token: ${{ secrets.GITHUB_TOKEN }}
+
- name: Check flake structure
run: nix flake check