Expose default Nix package

[Gnarus-G]

Summary

• expose the CLI as packages.x86_64-linux.default
• reuse one package derivation from the flake and NixOS module
• lock nixpkgs and document profile installation
• check both the package and enabled module configuration

Verification

• nix flake check path:/tmp/maccel in nixos/nix:latest

Fixes #93

Summary by CodeRabbit

• New Features

  • Added Nix packaging for the maccel CLI/TUI.
  • Added a default Nix package and NixOS module support for installing the CLI.
  • Added validation checks for the packaged CLI and NixOS configuration.

• Documentation

  • Added Quick Start instructions for installing the CLI with nix profile add.
  • Clarified that CLI installation does not include the kernel module; complete driver setup requires the NixOS module.

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Project	Deployment	Actions	Updated (UTC)
maccel	Ready	Preview	Aug 2, 2026 1:15am

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 83f3abc3-0aae-4269-99e7-f4486c9ce462

📥 Commits

Reviewing files that changed from the base of the PR and between 4ebdf1c and befb749.

⛔ Files ignored due to path filters (1)

• flake.lock is excluded by !**/*.lock

📒 Files selected for processing (4)

• README_NIXOS.md
• flake.nix
• module.nix
• package.nix

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📝 Walkthrough

Walkthrough

The PR adds a standalone Nix package for maccel-cli, integrates it into the NixOS module, exposes package and check outputs, and documents CLI-only installation with nix profile add.

Changes

Nix CLI packaging and installation

Layer / File(s)	Summary
CLI package definition package.nix	Adds a Rust package derivation for maccel-cli using Cargo.toml, Cargo.lock, and the maccel binary target.
NixOS module package integration module.nix	Replaces the inline package derivation with pkgs.callPackage ./package.nix {} and removes inline version extraction.
Flake outputs and installation guidance flake.nix, README_NIXOS.md	Adds CLI package outputs, NixOS module evaluation, validation checks, and CLI installation instructions.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Poem

A rabbit hops through Nix’s new lane,
Builds the CLI without kernel strain.
The module joins, the checks now sing,
Profiles add the useful thing.
maccel-cli is ready to spring!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: exposing the default Nix package.
Linked Issues check	✅ Passed	The flake exposes packages.x86_64-linux.default, which addresses issue #93.
Out of Scope Changes check	✅ Passed	The documentation, package derivation, module reuse, and flake checks support the stated Nix packaging objectives.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/93-nix-package

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