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R""(
**Note:** this command's interface is based heavily around [*installables*](./nix.md#installables), which you may want to read about first (`nix --help`).
# Examples
With [nixpkgs-fmt](https://github.com/nix-community/nixpkgs-fmt):
```nix
# flake.nix
{
outputs = { nixpkgs, self }: {
formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixpkgs-fmt;
};
}
```
- Format the current flake: `$ nix fmt`
- Format a specific folder or file: `$ nix fmt ./folder ./file.nix`
With [nixfmt](https://github.com/serokell/nixfmt):
```nix
# flake.nix
{
outputs = { nixpkgs, self }: {
formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt;
};
}
```
- Format specific files: `$ nix fmt ./file1.nix ./file2.nix`
With [Alejandra](https://github.com/kamadorueda/alejandra):
```nix
# flake.nix
{
outputs = { nixpkgs, self }: {
formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.alejandra;
};
}
```
- Format the current flake: `$ nix fmt`
- Format a specific folder or file: `$ nix fmt ./folder ./file.nix`
# Description
`nix fmt` will rewrite all Nix files (\*.nix) to a canonical format
using the formatter specified in your flake.
)""
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