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", "--"]
        }
      }
    }
  }
}