# Windows build path changed to add the target architecture

> In preparation for supporting Windows on Arm64, the Windows build path was updated to include the target architecture.




:::important
These breaking change docs are accurate, as of the release
under which they are published. Over time, the
workarounds described here might become inaccurate.
We don't, in general, keep these breaking change docs up
to date as of each release.

这些破坏性改动文档的准确性仅限于其发布时对应的版本。
随着时间的推移，文档中描述的方案可能会逐渐失效。
通常情况下，我们不会在每次发布新版本时都对这些文档进行同步更新。

The [breaking change index file](/release/breaking-changes)
lists the docs created for each release.

[破坏性改动列表](/release/breaking-changes) 
列出了每个版本的文档。

:::


## Summary

Built executables for Flutter Windows apps are now located in architecture
dependent folders.

## Context

In preparation for supporting Windows on Arm64, the Windows build path was
updated to add the build's target architecture.

Previously, Flutter builds for Windows assumed an x64 target architecture.

## Migration guide

You may need to update your infrastructure to use the new Flutter Windows
build path.

Example build path before the migration:

```plaintext
build\windows\runner\Release\hello_world.exe
```

Example build path after the migration if targeting x64:

```plaintext
build\windows\x64\runner\Release\hello_world.exe
```

Example build path after the migration if targeting Arm64:

```plaintext
build\windows\arm64\runner\Release\hello_world.exe
```

If you use [`package:msix`][], update to version 3.16.7 or newer.

[`package:msix`]: https://pub-web.flutter-io.cn/packages/msix

## Timeline

Landed in version: 3.15.0-0.0.pre<br>
In stable release: 3.16

## References

Design document:

* [flutter.dev/go/windows-arm64][]

Relevant pull requests:

* [Introduce architecture subdirectory for Windows build][]

[flutter.dev/go/windows-arm64]: https://flutter.cn/go/windows-arm64
[Introduce architecture subdirectory for Windows build]: https://github.com/flutter/flutter/pull/131843