Swift Package Index claims iOS compilation fails

[weissi]

See https://swiftpackageindex.com/apple/swift-nio/builds

    /Applications/Xcode-13.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types ${cwd}/Sources/NIOMulticastChat/main.swift -target x86_64-apple-macos10.10 -enable-objc-interop -sdk /Applications/Xcode-13.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk -I ${cwd}/.derivedData/Build/Products/Debug -I /Applications/Xcode-13.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug/PackageFrameworks -F ${cwd}/.derivedData/Build/Products/Debug -F /Applications/Xcode-13.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -enable-testing -g -module-cache-path ${cwd}/.derivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity\=checked -Onone -D SWIFT_PACKAGE -D DEBUG -D Xcode -new-driver-path /Applications/Xcode-13.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-driver -serialize-debugging-options -Xcc -working-directory -Xcc ${cwd} -resource-dir /Applications/Xcode-13.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift -enable-anonymous-context-mangled-names -Xcc -fmodule-map-file\=${cwd}/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/CNIOAtomics.modulemap -Xcc -fmodule-map-file\=${cwd}/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/CNIODarwin.modulemap -Xcc -fmodule-map-file\=${cwd}/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/CNIOLinux.modulemap -Xcc -I${cwd}/Sources/CNIOAtomics/include -Xcc -I${cwd}/Sources/CNIOWindows/include -Xcc -I${cwd}/Sources/CNIODarwin/include -Xcc -I${cwd}/Sources/CNIOLinux/include -Xcc -I${cwd}/.derivedData/Build/Products/Debug/include -Xcc -I${cwd}/.derivedData/Build/Intermediates.noindex/swift-nio.build/Debug/NIOMulticastChat.build/DerivedSources-normal/x86_64 -Xcc -I${cwd}/.derivedData/Build/Intermediates.noindex/swift-nio.build/Debug/NIOMulticastChat.build/DerivedSources/x86_64 -Xcc -I${cwd}/.derivedData/Build/Intermediates.noindex/swift-nio.build/Debug/NIOMulticastChat.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -module-name NIOMulticastChat -target-sdk-version 12.3 -emit-module-doc-path ${cwd}/.derivedData/Build/Intermediates.noindex/swift-nio.build/Debug/NIOMulticastChat.build/Objects-normal/x86_64/NIOMulticastChat.swiftdoc -emit-module-source-info-path ${cwd}/.derivedData/Build/Intermediates.noindex/swift-nio.build/Debug/NIOMulticastChat.build/Objects-normal/x86_64/NIOMulticastChat.swiftsourceinfo -o ${cwd}/.derivedData/Build/Intermediates.noindex/swift-nio.build/Debug/NIOMulticastChat.build/Objects-normal/x86_64/NIOMulticastChat.swiftmodule -emit-abi-descriptor-path ${cwd}/.derivedData/Build/Intermediates.noindex/swift-nio.build/Debug/NIOMulticastChat.build/Objects-normal/x86_64/NIOMulticastChat.abi.json
<unknown>:0: error: module map file '${cwd}/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/CNIOAtomics.modulemap' not found
<unknown>:0: error: module map file '${cwd}/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/CNIODarwin.modulemap' not found
<unknown>:0: error: module map file '${cwd}/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/CNIOLinux.modulemap' not found
${cwd}/Sources/NIOMulticastChat/main.swift:14:8: error: no such module 'NIOCore'
import NIOCore
       ^
Command EmitSwiftModule failed with a nonzero exit code

Resolve Package Graph
** BUILD FAILED **