Install Development Snapshot toolchain DEVELOPMENT-SNAPSHOT-2024-07-08-a or later from swift.org/install and run the following commands:
$ ( set -eo pipefail; \ V="$(swiftc --version | head -n1)"; \ TAG="$(curl -sL "https://raw.githubusercontent.com/swiftwasm/swift-sdk-index/refs/heads/main/v1/tag-by-version.json" | jq -e -r --arg v "$V" '.[$v] | .[-1]')"; \ curl -sL "https://raw.githubusercontent.com/swiftwasm/swift-sdk-index/refs/heads/main/v1/builds/$TAG.json" | \ jq -r '.["swift-sdks"]["wasm32-unknown-wasip1-threads"] | "swift sdk install \"\(.url)\" --checksum \"\(.checksum)\""' | sh -x ) $ export SWIFT_SDK_ID=$( V="$(swiftc --version | head -n1)"; \ TAG="$(curl -sL "https://raw.githubusercontent.com/swiftwasm/swift-sdk-index/refs/heads/main/v1/tag-by-version.json" | jq -e -r --arg v "$V" '.[$v] | .[-1]')"; \ curl -sL "https://raw.githubusercontent.com/swiftwasm/swift-sdk-index/refs/heads/main/v1/builds/$TAG.json" | \ jq -r '.["swift-sdks"]["wasm32-unknown-wasip1-threads"]["id"]' ) $ ./build.sh $ npx serve