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nixpkgs nixos-25.11 브랜치의 nixos/doc/manual/ 디렉토리를 sparse clone으로 가져와 ~/obsidian/dev/nixos-manual/에 복사. _index.md에 구조/갱신 방법 정리. 오프라인 참조 + AI 에이전트 컨텍스트용. sandbox-tokyo 같은 NixOS 노드 운영 시 빠른 참조로 사용.
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Network Problems
Nix uses a so-called binary cache to optimise building a package from
source into downloading it as a pre-built binary. That is, whenever a
command like nixos-rebuild needs a path in the Nix store, Nix will try
to download that path from the Internet rather than build it from
source. The default binary cache is https://cache.nixos.org/. If this
cache is unreachable, Nix operations may take a long time due to HTTP
connection timeouts. You can disable the use of the binary cache by
adding --option use-binary-caches false, e.g.
# nixos-rebuild switch --option use-binary-caches false
If you have an alternative binary cache at your disposal, you can use it instead:
# nixos-rebuild switch --option binary-caches http://my-cache.example.org/