370c7da4a9
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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Declarative Package Management
With declarative package management, you specify which packages you want
on your system by setting the option
. For instance, adding the
following line to configuration.nix enables the Mozilla Thunderbird
email application:
{ environment.systemPackages = [ pkgs.thunderbird ]; }
The effect of this specification is that the Thunderbird package from
Nixpkgs will be built or downloaded as part of the system when you run
nixos-rebuild switch.
::: {.note} Some packages require additional global configuration such as D-Bus or systemd service registration so adding them to might not be sufficient. You are advised to check the list of options whether a NixOS module for the package does not exist. :::
You can get a list of the available packages as follows:
$ nix-env -qaP '*' --description
nixos.firefox firefox-23.0 Mozilla Firefox - the browser, reloaded
...
The first column in the output is the attribute name, such as
nixos.thunderbird.
Note: the nixos prefix tells us that we want to get the package from
the nixos channel and works only in CLI tools. In declarative
configuration, use pkgs prefix (variable).
To "uninstall" a package, remove it from
and run nixos-rebuild switch.
customizing-packages.section.md
adding-custom-packages.section.md