Nix

v0.1.5 · by Hasit Mistry · added 3 November 2026

Nix support.

LanguagesLanguage servers

How to install

With Forge Super installed, the button above opens the app on this extension, where you press Install. Nothing is installed until you do.

You can also open the Extensions panel in the app and search for Nix. The extension's id is nix.

Don't have Forge Super yet? Download it here.

README

From the extension's repository, written by its authors and not by Mentenaz. See the source.

Nix

Nix language support in Zed

Configuration

Various options can be configured via Zed settings.json files.

Configure Nixd

{
  "lsp": {
    "nixd": {
      "settings": {
        "diagnostic": {
          "suppress": [ "sema-extra-with" ]
        }
      }
    }
  }
}

See: Nixd LSP Configuration Docs for more options.

Configure Nil

{
  "lsp": {
    "nil": {
      "settings": {
         "diagnostics": {
          "ignored": [ "unused_binding" ]
        }
      }
    }
  }
}

See: Nil LSP Configuration Docs for more options.

Only use Nixd

{
  "languages": {
    "Nix": {
      "language_servers": [ "nixd", "!nil" ]
    }
  }
}

Only use Nil

{
  "languages": {
    "Nix": {
      "language_servers": [ "nil", "!nixd" ]
    }
  }
}

Configure formatters

You can configure formatters through LSP:

{
  "lsp": {
    "nil": {    // or "nixd":
      "initialization_options": {
        "formatting": {
          "command": ["alejandra", "--quiet", "--"]  // or ["nixfmt"]
        }
      }
    }
  }
}

Or through Zed itself:

{
  "languages": {
    "Nix": {
      "formatter": {
        "external": {
          "command": "alejandra",  // or "nixfmt"
          "arguments": ["--quiet", "--"]
        }
      }
    }
  }
}