Unable to create default Swift SDK using Readme instructions

[215eight]

Steps to reproduce

git clone https://github.com/swiftlang/swift-sdk-generator.git
cd swift-sdk-generator
swift run swift-sdk-generator make-linux-sdk

swift experimental-sdk install /Users/eandrade/Dev/swift-sdk-generator/Bundles/6.1-RELEASE_ubuntu_jammy_aarch64.artifactbundle
Output:
warning: `swift experimental-sdk` command is deprecated and will be removed in a future version of SwiftPM. Use `swift sdk` instead.
warning: Swift SDK metadata file not found at /Users/eandrade/Dev/swift-sdk-generator/Bundles/6.1-RELEASE_ubuntu_jammy_aarch64.artifactbundle/6.1-RELEASE_ubuntu_jammy_aarch64/aarch64-unknown-linux-gnu/swift-sdk.json/swift-sdk.json for a variant of artifact 6.1-RELEASE_ubuntu_jammy_aarch64
Swift SDK bundle at `/Users/eandrade/Dev/swift-sdk-generator/Bundles/6.1-RELEASE_ubuntu_jammy_aarch64.artifactbundle` successfully installed as 6.1-RELEASE_ubuntu_jammy_aarch64.artifactbundle.

mkdir cross-compilation-test
cd cross-compilation-test
swift package init --type executable

swift build --experimental-swift-sdk 6.1-RELEASE_ubuntu_jammy_aarch64
Output:
warning: `--experimental-swift-sdk` is deprecated and will be removed in a future version of SwiftPM. Use `--swift-sdk` instead.
warning: Swift SDK metadata file not found at /Users/eandrade/Library/org.swift.swiftpm/swift-sdks/6.1-RELEASE_ubuntu_jammy_aarch64.artifactbundle/6.1-RELEASE_ubuntu_jammy_aarch64/aarch64-unknown-linux-gnu/swift-sdk.json/swift-sdk.json for a variant of artifact 6.1-RELEASE_ubuntu_jammy_aarch64
error: No Swift SDK found matching query `6.1-RELEASE_ubuntu_jammy_aarch64` and host triple `arm64-apple-macosx15.0`. Use `swift sdk list` command to see available Swift SDKs.

swift sdk list
Output:
6.1-RELEASE_ubuntu_jammy_aarch64
warning: Swift SDK metadata file not found at /Users/eandrade/Library/org.swift.swiftpm/swift-sdks/6.1-RELEASE_ubuntu_jammy_aarch64.artifactbundle/6.1-RELEASE_ubuntu_jammy_aarch64/aarch64-unknown-linux-gnu/swift-sdk.json/swift-sdk.json for a variant of artifact 6.1-RELEASE_ubuntu_jammy_aarch64

Folder Structure

└── 6.1-RELEASE_ubuntu_jammy_aarch64.artifactbundle
    ├── 6.1-RELEASE_ubuntu_jammy_aarch64
    │   └── aarch64-unknown-linux-gnu
    │       ├── swift-sdk.json <<<< ISSUE HERE
    │       ├── toolset.json
    │       └── ubuntu-jammy.sdk
    │           ├── etc
    │           │   └── ... 
    │           ├── lib
    │           │   ├── ...
    │           └── usr
    │               ├── ... 
    └── info.json

Issue

Expected metadata file path:
6.1-RELEASE_ubuntu_jammy_aarch64/aarch64-unknown-linux-gnu/swift-sdk.json/swift-sdk.json

Actual metadata file path:
6.1-RELEASE_ubuntu_jammy_aarch64/aarch64-unknown-linux-gnu/swift-sdk.json

[MaxDesiatov]

Thanks for reporting this @215eight, the immediate workaround is to use latest Swift 6.2 or main development snapshots. This reason is that we unconditionally generate new metadata format that's incompatible with Swift 6.1. I'll submit a PR here in due course so that old format is used for Swift 6.1.