rubyfmt: avoid failing upon warning (#322233)

diff --git i/librubyfmt/build.rs w/librubyfmt/build.rs

index 296b749..941a4ca 100644

--- i/librubyfmt/build.rs

+++ w/librubyfmt/build.rs

@@ -166,6 +166,7 @@ fn run_configure(ruby_checkout_path: &Path) -> Output {

         command

             .arg("--target=aarch64-unknown-linux-gnu")

             .arg("--host=x86_64")

+            .arg("--disable-werror")

             .env("CC", "aarch64-linux-gnu-gcc")

             .env("AR", "aarch64-linux-gnu-ar")

             .env("RANLIB", "aarch64-linux-gnu-ranlib");

diff --git i/librubyfmt/src/lib.rs w/librubyfmt/src/lib.rs

index 9b94b5f..b78e99f 100644

--- i/librubyfmt/src/lib.rs

+++ w/librubyfmt/src/lib.rs

@@ -1,4 +1,3 @@

-#![deny(warnings, missing_copy_implementations)]

 #![allow(clippy::upper_case_acronyms, clippy::enum_variant_names)]

 use serde::de::value;

 No newline at end of file

  cargoPatches = [

    # Avoid checking whether ruby gitsubmodule is up-to-date.

    ./0002-remove-dependency-on-git.patch

    # Avoid failing on unused variable warnings.

    ./0003-ignore-warnings.patch

  ];

  cargoHash = "sha256-QZ26GmsKyENkzdCGg2peie/aJhEt7KQAF/lwsibonDk=";

    homepage = "https://github.com/fables-tales/rubyfmt";

    license = licenses.mit;

    maintainers = with maintainers; [ bobvanderlinden ];

    # https://github.com/NixOS/nixpkgs/issues/320722

    broken = true

      # = note: Undefined symbols for architecture x86_64:

      #       "_utimensat", referenced from:

      #           _utime_internal in librubyfmt-3c969812b3b27083.rlib(file.o)

      || stdenv.isDarwin && stdenv.isx86_64;

    broken = stdenv.isDarwin && stdenv.isx86_64;

    mainProgram = "rubyfmt";

  };

}