nixos-riscv/overlay.nix

final: prev:

# Changes to packages from nixpkgs

{
  opensbi = prev.opensbi.overrideAttrs (old: {
    makeFlags = old.makeFlags ++ [
        # Build OpenSBI without compressed instructions
        "PLATFORM_RISCV_ISA=rv64gv"
        # Check with: riscv64-unknown-elf-objdump -d -M no-aliases rotate
    ];
  });

  # Fix GCC 13 format-overflow warning/error:
  # ../src/shared/install.c:444:64: error: ‘%s’ directive argument is null [-Werror=format-overflow=]
  # 444 |                         err = log_error_errno(changes[i].type, "Failed to %s unit, unit %s does not exist.",
  #     |                                                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  systemd = prev.systemd.overrideAttrs (old: {
    CFLAGS = "-Wno-error=format-overflow";
  });

  qemu = prev.qemu.override { rutabagaSupport = false; };
}