mcp-nixos MCP — 사용 사례, 설치 & 라이브 데모

왜 쓰나요

핵심 기능

130k+ NixOS packages + 23k+ system options queryable
Covers Home Manager (5k+ options), nix-darwin (1k+ macOS settings), Nixvim, FlakeHub, Noogle
nix_versions tool for historical versions + pinned nixpkgs commit hashes
No auth required — public API queries only
Runs via uvx, Nix flake, or Docker

라이브 데모

실제 사용 모습

nixos.replay ▶ 준비됨

0/0

설치

클라이언트 선택

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "nixos": {
      "command": "uvx",
      "args": [
        "mcp-nixos"
      ],
      "_inferred": true
    }
  }
}

Claude Desktop → Settings → Developer → Edit Config 열기. 저장 후 앱 재시작.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "nixos": {
      "command": "uvx",
      "args": [
        "mcp-nixos"
      ],
      "_inferred": true
    }
  }
}

Cursor는 Claude Desktop과 동일한 mcpServers 스키마 사용. 프로젝트 설정이 전역보다 우선.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "nixos": {
      "command": "uvx",
      "args": [
        "mcp-nixos"
      ],
      "_inferred": true
    }
  }
}

Cline 사이드바의 MCP Servers 아이콘 클릭 후 "Edit Configuration" 선택.

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "nixos": {
      "command": "uvx",
      "args": [
        "mcp-nixos"
      ],
      "_inferred": true
    }
  }
}

Claude Desktop과 같은 형식. Windsurf 재시작 후 적용.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "nixos",
      "command": "uvx",
      "args": [
        "mcp-nixos"
      ]
    }
  ]
}

Continue는 맵이 아닌 서버 오브젝트 배열 사용.

~/.config/zed/settings.json

{
  "context_servers": {
    "nixos": {
      "command": {
        "path": "uvx",
        "args": [
          "mcp-nixos"
        ]
      }
    }
  }
}

context_servers에 추가. 저장 시 Zed가 핫 리로드.

claude mcp add nixos -- uvx mcp-nixos

한 줄 명령. claude mcp list로 확인, claude mcp remove로 제거.

사용 사례

실전 활용법: mcp-nixos

Find a NixOS package by fuzzy name or purpose

👤 NixOS users, flake authors ⏱ ~5 min beginner

언제 쓸까: You remember roughly what the package does but not its nix attribute name.

흐름

Search

Find NixOS packages matching 'ocr command line tool'.✓ 복사됨

→ Ranked list of candidates with descriptions
Get details on the best fit

For tesseract, show me the attribute path, version in unstable vs 24.11, and which meta.platforms are supported.✓ 복사됨

→ Detail card with attr, versions, platforms

결과: The exact attribute to drop into your configuration.nix or flake.

함정

Channel mismatch — package only exists in unstable, not your stable channel — Ask explicitly about the channel you're on

함께 쓰기: filesystem

Look up a NixOS module option with its type and default

👤 People writing NixOS modules ⏱ ~5 min beginner

언제 쓸까: You know there's an option 'somewhere' for enabling zswap and you don't want to grep nixpkgs.

흐름

Query options

Is there a NixOS option for enabling zswap? Show its type, default, and description.✓ 복사됨

→ Full option card
Get an example

Give me a minimal configuration.nix snippet that enables zswap with z3fold and 20% memory.✓ 복사됨

→ Copy-paste Nix snippet

결과: A correct option usage ready to paste in.

Pin nixpkgs to an old version of a package

👤 Users needing a specific older version ⏱ ~10 min intermediate

언제 쓸까: A newer version broke something and you want the last known-good commit.

흐름

Find historical versions

Show me past versions of nodejs_20 in nixpkgs with commit hashes.✓ 복사됨

→ Version→commit table
Generate a flake input

Generate the flake input pinning nodejs_20 20.15.0 from that commit.✓ 복사됨

→ Ready-to-paste flake.nix snippet

결과: A reproducibly pinned input for rollback.

함께 쓰기: filesystem

Discover Home Manager options for a program

👤 Anyone using Home Manager ⏱ ~10 min beginner

언제 쓸까: You want to manage a program declaratively but aren't sure what options exist.

흐름

List program options

List every Home Manager option under programs.neovim.✓ 복사됨

→ Categorized option list
Build a minimal block

Give me a minimal programs.neovim block enabling Telescope and LSP for TS/Python.✓ 복사됨

→ Working HM snippet

결과: A working Home Manager config without reading the full manual.

조합

다른 MCP와 조합해 10배 효율

nixos + filesystem

Find the option and write it into your config file

Find the NixOS option to enable flatpak, then add it to ~/nixos/configuration.nix with a comment.✓ 복사됨

nixos + github

Raise an issue when a package is missing

Is package foo-cli in nixpkgs? If not, open a github issue on our fork requesting it.✓ 복사됨

도구

이 MCP가 노출하는 것

도구	입력	언제 호출	비용
nix	action: search\|info\|stats\|options\|channels\|flake-inputs\|cache, args: ...	Any query over packages, options, channels	1 upstream API call
nix_versions	package: str	Need an older version / nixpkgs pin	1 upstream call

비용 및 제한

운영 비용

API 쿼터: Public APIs; generous limits but not infinite — don't hammer
호출당 토큰: Options with descriptions: 500-2000 tokens. Lists can be larger.
금액: Free
팁: Prefer info on one package over search returning 50.

보안

권한, 시크릿, 파급범위

자격 증명 저장: None

데이터 외부 송신: Calls to search.nixos.org and related public APIs

Results reflect whatever upstream NixOS search returns — re-verify against your channel.
mcp-nixos does not run Nix; it does not execute any derivation.

문제 해결

자주 발생하는 오류와 해결

uvx not found

Install uv: curl -LsSf https://astral.sh/uv/install.sh | sh, then re-add the MCP.

확인: uvx --version

No results for a package I know exists

Spelling varies in attribute names — try a looser query or search by description.

확인: Retry with partial keyword

Stale version info

The MCP caches briefly; re-query in 5 minutes or pass action=cache to refresh.

대안

mcp-nixos 다른 것과 비교

대안	언제 쓰나	단점/장점
search.nixos.org directly	You're fine with a browser tab	No AI in the loop
nix-search CLI	You want local fast search and have Nix installed	Needs local Nix + an up-to-date channel

mcp-nixos