Expected Swift 6.1 but found Swift 6.2 from AG/update.sh

[devahmedshendy]

I am trying to run ./Scripts/CI/darwin_setup_build.sh to try library before learning the source code.

After several tries, I could successfully solve many issues, except it confuses me does it need Swift 6.2 or Swift 6.1, Because I have to install Xcode 26.3 to provide Swift 6.2 for previous error (error: 'darwinprivateframeworks': package 'darwinprivateframeworks' is using Swift tools version 6.2.0 but the installed version is 6.1.0) but now it needs 6.1 for this step:

Error: expected Swift 6.1 but found Swift 6.2
Set DEVELOPER_DIR to the correct Xcode version
Error: failed to regenerate AttributeGraph Swift interface for release 2021
error: CommandFailedError(command: "AG/update.sh", status: 1)

[Kyle-Ye]

This looks like you are using an older OpenSwiftUI checkout / Package.resolved that still points to an older DarwinPrivateFrameworks revision. That old DPF revision had a toolchain mismatch around AG/update.sh, so it could ask for Swift 6.1 while the package/toolchain setup already required Swift 6.2.

This has been fixed in DarwinPrivateFrameworks at OpenSwiftUIProject/DarwinPrivateFrameworks@1c33883, and current OpenSwiftUI main already pins that revision.

You need to update OpenSwiftUI and rerunning the setup from a clean sibling DPF checkout?

git pull --ff-only
rm -rf ../DarwinPrivateFrameworks
./Scripts/CI/darwin_setup_build.sh