Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: box64 0.3.8 -> 0.4.0 https://github.com/ptitSeb/box64/releases
attrpath: box64
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/dc8pvrsxhgl02qn1naqvcfszk3df7ji0-packages.json.drv
building '/nix/store/dc8pvrsxhgl02qn1naqvcfszk3df7ji0-packages.json.drv'...

Going to be running update for following packages:
 - box64-0.3.8

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - box64-0.3.8: UPDATING ...
 - box64-0.3.8: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/applications/emulators/box64/default.nix b/pkgs/applications/emulators/box64/default.nix
index 1960fc844bcd..928b816078df 100644
--- a/pkgs/applications/emulators/box64/default.nix
+++ b/pkgs/applications/emulators/box64/default.nix
@@ -21,13 +21,13 @@ assert
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "box64";
-  version = "0.3.8";
+  version = "0.4.1-1";
 
   src = fetchFromGitHub {
     owner = "ptitSeb";
     repo = "box64";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-PVzv1790UhWbqLmw/93+mU3Gw8lQek7NBls4LXks4wQ=";
+    hash = "sha256-evCKub1X43YfBk1ywsfoOe4KoAwABEYVS6t+0l+IdfE=";
   };
 
   # Setting cpu doesn't seem to work (or maybe isn't enough / gets overwritten by the wrapper's arch flag?), errors about unsupported instructions for target

No auto update branch exists
Old version 0.3.8" not present in master derivation file with contents: {
  lib,
  stdenv,
  fetchFromGitHub,
  gitUpdater,
  cmake,
  python3,
  withDynarec ? (
    stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isRiscV64 || stdenv.hostPlatform.isLoongArch64
  ),
  runCommand,
  hello-x86_64,
}:

# Currently only supported on specific archs
assert
  withDynarec
  -> (
    stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isRiscV64 || stdenv.hostPlatform.isLoongArch64
  );

stdenv.mkDerivation (finalAttrs: {
  pname = "box64";
  version = "0.4.0";

  src = fetchFromGitHub {
    owner = "ptitSeb";
    repo = "box64";
    tag = "v${finalAttrs.version}";
    hash = "sha256-ihg7sos2pyyZjXiYMct/gg/ianiu0yagNtXio+A7J3c=";
  };

  # Setting cpu doesn't seem to work (or maybe isn't enough / gets overwritten by the wrapper's arch flag?), errors about unsupported instructions for target
  # (this is for code that gets executed conditionally if the cpu at runtime supports their features, so setting this should be fine)
  postPatch = ''
    substituteInPlace CMakeLists.txt \
      --replace-fail 'ASMFLAGS  -pipe -mcpu=cortex-a76' 'ASMFLAGS  -pipe -march=armv8.2-a+fp16+dotprod'
  '';

  nativeBuildInputs = [
    cmake
    python3
  ];

  cmakeFlags = [
    (lib.cmakeBool "NOGIT" true)

    # Arch mega-option
    (lib.cmakeBool "ARM64" stdenv.hostPlatform.isAarch64)
    (lib.cmakeBool "RV64" stdenv.hostPlatform.isRiscV64)
    (lib.cmakeBool "PPC64LE" (stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian))
    (lib.cmakeBool "LARCH64" stdenv.hostPlatform.isLoongArch64)
  ]
  ++ lib.optionals stdenv.hostPlatform.isx86_64 [
    # x86_64 has no arch-specific mega-option, manually enable the options that apply to it
    (lib.cmakeBool "LD80BITS" true)
    (lib.cmakeBool "NOALIGN" true)
  ]
  ++ [
    # Arch dynarec
    (lib.cmakeBool "ARM_DYNAREC" (withDynarec && stdenv.hostPlatform.isAarch64))
    (lib.cmakeBool "RV64_DYNAREC" (withDynarec && stdenv.hostPlatform.isRiscV64))
    (lib.cmakeBool "LARCH64_DYNAREC" (withDynarec && stdenv.hostPlatform.isLoongArch64))
  ];

  installPhase = ''
    runHook preInstall

    install -Dm 0755 box64 "$out/bin/box64"

    runHook postInstall
  '';

  doCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform;

  doInstallCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform;

  installCheckPhase = ''
    runHook preInstallCheck

    echo Checking if it works
    $out/bin/box64 -v

    echo Checking if Dynarec option was respected
    $out/bin/box64 -v 2>&1 | grep ${lib.optionalString (!withDynarec) "-v"} Dynarec

    runHook postInstallCheck
  '';

  passthru = {
    updateScript = gitUpdater { rev-prefix = "v"; };
    tests.hello = runCommand "box64-test-hello" { nativeBuildInputs = [ finalAttrs.finalPackage ]; } ''
      BOX64_LOG=1 box64 ${lib.getExe hello-x86_64} --version 2>&1 | tee $out
    '';
  };

  meta = {
    homepage = "https://box86.org/";
    description = "Lets you run x86_64 Linux programs on non-x86_64 Linux systems";
    changelog = "https://github.com/ptitSeb/box64/releases/tag/v${finalAttrs.version}";
    license = lib.licenses.mit;
    maintainers = with lib.maintainers; [
      gador
      OPNA2608
    ];
    mainProgram = "box64";
    platforms = [
      "x86_64-linux"
      "aarch64-linux"
      "riscv64-linux"
      "powerpc64le-linux"
      "loongarch64-linux"
      "mips64el-linux"
    ];
  };
})