chore(nix): update nix packages to v0.3.0

[mkqavi]

No description provided.

[Copilot]

🟡 Changes recommended

Critical native dependency issues and moderate compatibility regressions remain unresolved.

Get a fresh assessment by requesting another Copilot review.

Pull request overview

Updates Nix packaging for commit-email v0.3.0.

Changes:

• Refactors release and development package definitions.
• Updates supported systems and package defaults.
• Removes the obsolete pinned Rust nixpkgs input.

File summaries

File	Summary
flake.nix	Defines v0.3.0 packages and system targets; native dependencies and compatibility outputs require correction.
flake.lock	Removes the obsolete pinned Rust nixpkgs input.

Review details

Suppressed comments (1)

flake.nix:37

• The previous flake exported packages.<system>.stable for the release build, but this change removes that output in favor of default. Existing consumers invoking nix build .#stable will therefore fail on a version-update PR; retain stable = default as a compatibility alias or explicitly treat this as a breaking flake API change.

        {
          default = pkgs.rustPlatform.buildRustPackage (

• Files reviewed: 1/2 changed files
• Comments generated: 2
• Review effort level: Lite

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.