# Nix

> Use when Nix, nixpkgs, flakes, NixOS, derivations, shells, or Home Manager are involved.

- Skill: `anntnzrb/nix` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add anntnzrb/nix`
- Raw SKILL.md: https://api.skillmd.com/api/skills/anntnzrb/nix/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: AGPL-3.0-or-later
- Author: anntnzrb (https://skillmd.com/u/anntnzrb)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/anntnzrb/nix

---


# Nix Development

Research-first Nix development using **parallel Context7 `docs` queries** for accurate, up-to-date information.

## Workflow

```
1. IDENTIFY  → Match question to relevant repos
2. QUERY     → Launch parallel subagents to query Context7
3. SYNTHESIZE → Combine results into actionable guidance
```

## Engineering checks

- Keep inputs and outputs explicit; validate external values at the module boundary with options, types, or assertions where a bad value would otherwise fail obscurely
- Preserve evaluation and build errors with context; do not mask failures through broad defaults or silent fallbacks
- Make package, source, and runtime ownership explicit in derivations; keep cleanup and platform assumptions local to the boundary that owns them
- Validate the user-visible result with the narrowest applicable eval, build, check, or VM test; do not test only formatting or implementation detail
- Add overlays, modules, dependencies, or abstraction only for a concrete consumer or platform need

## Required follow-up reads

|Need|Read|When|
|---|---|---|
|Repository routing, Context7 queries, topic mapping|`reference.md`|Before selecting documentation sources|