Swift Package IndexBuild Information
Failed to build SwiftMCP, reference v1.14.0 (fcbe9f), with Swift 6.1 for macOS (Xcode) using Xcode 16.3 on 10 Oct 2026 02:54:13 UTC.
Build Command
No build command. This typically means the build failed at an early stage where we determine the build command.Build Log
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RunAll
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Builder version: 5.1.1
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/Cocoanetics/SwiftMCP.git
Reference: v1.14.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Cocoanetics/SwiftMCP
* tag v1.14.0 -> FETCH_HEAD
HEAD is now at fcbe9f4 Allow swift-syntax 604 (#203)
Cloned https://github.com/Cocoanetics/SwiftMCP.git
Revision (git rev-parse @):
fcbe9f43a0e87a1cfcea5cb8edd0e38a48afbc2f
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/Cocoanetics/SwiftMCP.git at v1.14.0
========================================
Build
========================================
Selected platform: macosXcodebuild
Swift version: 6.1
Building package at path: $PWD
https://github.com/Cocoanetics/SwiftMCP.git
https://github.com/Cocoanetics/SwiftMCP.git
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"Protocols/MCPLoggingProviding.swift",
"Protocols/MCPPromptProviding.swift",
"Protocols/MCPResourceProviding.swift",
"Protocols/MCPServer+Discover.swift",
"Protocols/MCPServer+Handlers.swift",
"Protocols/MCPServer+Initialize.swift",
"Protocols/MCPServer+Logging.swift",
"Protocols/MCPServer+MRTR.swift",
"Protocols/MCPServer+Prompts.swift",
"Protocols/MCPServer+RequestState.swift",
"Protocols/MCPServer+Resources.swift",
"Protocols/MCPServer+Tools.swift",
"Protocols/MCPServer.swift",
"Protocols/MCPService.swift",
"Protocols/MCPToolErrorMetaProviding.swift",
"Protocols/MCPToolProviding.swift",
"SwiftMCP.swift",
"Transport/Adapters/HTTPLogger.swift",
"Transport/Adapters/InMemoryHTTPServerAdapter.swift",
"Transport/Adapters/InboundBodyBuffer.swift",
"Transport/Adapters/NIOHTTPServerAdapter.swift",
"Transport/Address.swift",
"Transport/ConnectionTaskTracker.swift",
"Transport/HTTPFieldName+MCP.swift",
"Transport/HTTPSSETransport+Authorize.swift",
"Transport/HTTPSSETransport+Broadcasting.swift",
"Transport/HTTPSSETransport+KeepAlive.swift",
"Transport/HTTPSSETransport+Routes.swift",
"Transport/HTTPSSETransport+SSE.swift",
"Transport/HTTPSSETransport.swift",
"Transport/LocalOnlyRegistration.swift",
"Transport/OAuth/Data+base64URLEncoded.swift",
"Transport/OAuth/DefaultJWSJWTPayload.swift",
"Transport/OAuth/JSONWebKey.swift",
"Transport/OAuth/JSONWebKeySet.swift",
"Transport/OAuth/JSONWebToken.swift",
"Transport/OAuth/JWTTokenValidator.swift",
"Transport/OAuth/JWTValidationOptions.swift",
"Transport/OAuth/OAuthConfiguration+Auth0.swift",
"Transport/OAuth/OAuthConfiguration+Extensions.swift",
"Transport/OAuth/OAuthConfiguration.swift",
"Transport/OAuth/OAuthConfigurationError.swift",
"Transport/OAuth/OAuthTokenResponse.swift",
"Transport/OAuth/OIDCWellKnownConfiguration.swift",
"Transport/RequestContext+ProtocolVersion.swift",
"Transport/RequestContext.swift",
"Transport/RequestState.swift",
"Transport/Routing/AsyncStream_Data+RouteBody.swift",
"Transport/Routing/CORSRoutes.swift",
"Transport/Routing/ChunkedFileReader.swift",
"Transport/Routing/HTTPFields+Legacy.swift",
"Transport/Routing/HTTPRoute.swift",
"Transport/Routing/HTTPRouteRequest.swift",
"Transport/Routing/HTTPRouteResponse+Data.swift",
"Transport/Routing/HTTPRouteResponse+Stream.swift",
"Transport/Routing/HTTPRouteResponse.swift",
"Transport/Routing/LegacySSERoutes.swift",
"Transport/Routing/MCPRoutes+ModernHeaders.swift",
"Transport/Routing/MCPRoutes+SSE.swift",
"Transport/Routing/MCPRoutes.swift",
"Transport/Routing/NoRedirectDelegate.swift",
"Transport/Routing/OAuthRoutes+Proxy.swift",
"Transport/Routing/OAuthRoutes.swift",
"Transport/Routing/OpenAPIRoutes.swift",
"Transport/Routing/Optional+RouteBody.swift",
"Transport/Routing/RouteBody.swift",
"Transport/Routing/RouteMatch.swift",
"Transport/Routing/RouteResponse.swift",
"Transport/Routing/Router.swift",
"Transport/Routing/SessionRouteHelpers.swift",
"Transport/SSEStreamTypes.swift",
"Transport/Serving/MCPDispatcher.swift",
"Transport/Serving/MCPHTTPEngine.swift",
"Transport/Serving/MCPServer+Serve.swift",
"Transport/Serving/MCPTransport.swift",
"Transport/Session+Extensions.swift",
"Transport/Session.swift",
"Transport/SessionInitializationGate.swift",
"Transport/SessionManager+Broadcasting.swift",
"Transport/SessionManager+Sessions.swift",
"Transport/SessionManager+Streams.swift",
"Transport/SessionManager.swift",
"Transport/StdioTransport.swift",
"Transport/TCPBonjourTransport+Advertisement.swift",
"Transport/TCPBonjourTransport+Broadcasting.swift",
"Transport/TCPBonjourTransport+Connections.swift",
"Transport/TCPBonjourTransport+Lifecycle.swift",
"Transport/TCPBonjourTransport+Listener.swift",
"Transport/TCPBonjourTransport+Output.swift",
"Transport/TCPBonjourTransport+State.swift",
"Transport/TCPBonjourTransport+Watchdog.swift",
"Transport/TCPBonjourTransport.swift",
"Transport/Transport+Extensions.swift",
"Transport/Transport.swift",
"Transport/TransportError.swift",
"Transport/UserInfo.swift"
],
"target_dependencies" : [
"SwiftMCPMacros"
],
"type" : "library"
},
{
"c99name" : "ProxyDemoCLI",
"module_type" : "SwiftTarget",
"name" : "ProxyDemoCLI",
"path" : "Demos/ProxyDemoCLI",
"product_dependencies" : [
"ArgumentParser"
],
"product_memberships" : [
"ProxyDemoCLI"
],
"sources" : [
"ProxyDemoCLI.swift",
"ProxyDemoFormatter.swift",
"ToolsProxy.swift"
],
"target_dependencies" : [
"SwiftMCP"
],
"type" : "executable"
},
{
"c99name" : "PrototypeServerLib",
"module_type" : "SwiftTarget",
"name" : "PrototypeServerLib",
"path" : "Demos/PrototypeServerLib",
"product_memberships" : [
"PrototypeRunner",
"PrototypeServerLib",
"PrototypeExtensionsLib"
],
"sources" : [
"PrototypeServer+Math.swift",
"PrototypeServer+Strings.swift",
"PrototypeServer.swift"
],
"target_dependencies" : [
"SwiftMCP",
"SwiftMCPAggregator"
],
"type" : "library"
},
{
"c99name" : "PrototypeRunner",
"module_type" : "SwiftTarget",
"name" : "PrototypeRunner",
"path" : "Demos/PrototypeRunner",
"product_memberships" : [
"PrototypeRunner"
],
"sources" : [
"main.swift"
],
"target_dependencies" : [
"SwiftMCP",
"PrototypeServerLib",
"PrototypeExtensionsLib"
],
"type" : "executable"
},
{
"c99name" : "PrototypeExtensionsLib",
"module_type" : "SwiftTarget",
"name" : "PrototypeExtensionsLib",
"path" : "Demos/PrototypeExtensionsLib",
"product_memberships" : [
"PrototypeRunner",
"PrototypeExtensionsLib"
],
"sources" : [
"PrototypeServer+CrossTarget.swift"
],
"target_dependencies" : [
"SwiftMCP",
"PrototypeServerLib",
"SwiftMCPAggregator"
],
"type" : "library"
}
],
"tools_version" : "6.1"
}
Command line invocation:
/Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/Cocoanetics/SwiftCross.git
Fetching from https://github.com/apple/swift-certificates.git
Fetching from https://github.com/swift-server/swift-service-lifecycle.git
Fetching from https://github.com/swiftlang/swift-docc-plugin.git (cached)
Fetching from https://github.com/Cocoanetics/JSONFoundation.git
Fetching from https://github.com/apple/swift-crypto.git (cached)
Fetching from https://github.com/swiftlang/swift-syntax.git (cached)
Fetching from https://github.com/apple/swift-nio-extras.git (cached)
Fetching from https://github.com/apple/swift-http-types.git (cached)
Fetching from https://github.com/apple/swift-nio.git (cached)
Fetching from https://github.com/apple/swift-log.git (cached)
Fetching from https://github.com/apple/swift-argument-parser.git (cached)
Fetching from https://github.com/swiftlang/swift-subprocess.git
Resolve Package Graph
Updating from https://github.com/swiftlang/swift-syntax.git
Updating from https://github.com/Cocoanetics/JSONFoundation.git
Updating from https://github.com/apple/swift-crypto.git
Updating from https://github.com/swiftlang/swift-docc-plugin.git
Updating from https://github.com/apple/swift-certificates.git
Updating from https://github.com/swift-server/swift-service-lifecycle.git
Updating from https://github.com/Cocoanetics/SwiftCross.git
Updating from https://github.com/apple/swift-nio-extras.git
Updating from https://github.com/apple/swift-http-types.git
Updating from https://github.com/apple/swift-nio.git
Updating from https://github.com/apple/swift-argument-parser.git
Updating from https://github.com/apple/swift-log.git
Updating from https://github.com/swiftlang/swift-subprocess.git
Resolve Package Graph
Updating from https://github.com/apple/swift-crypto.git
Updating from https://github.com/apple/swift-certificates.git
Updating from https://github.com/Cocoanetics/SwiftCross.git
Updating from https://github.com/Cocoanetics/JSONFoundation.git
Updating from https://github.com/swiftlang/swift-docc-plugin.git
Updating from https://github.com/swift-server/swift-service-lifecycle.git
Updating from https://github.com/swiftlang/swift-syntax.git
Updating from https://github.com/apple/swift-nio-extras.git
Updating from https://github.com/apple/swift-http-types.git
Updating from https://github.com/apple/swift-nio.git
Updating from https://github.com/apple/swift-argument-parser.git
Updating from https://github.com/apple/swift-log.git
Updating from https://github.com/swiftlang/swift-subprocess.git
Resolved source packages:
spi-builder-workspace: (null)
2026-10-09 19:54:10.374 xcodebuild[527:2999] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-09-10_19-54-0010.xcresult
xcodebuild: error: Could not resolve package dependencies:
Failed to resolve dependencies Dependencies could not be resolved because 'swift-subprocess' >= 0.5.0 contains incompatible tools version (6.2.0) and root depends on 'jsonfoundation' 3.1.0..<4.0.0.
'jsonfoundation' >= 3.1.0 practically depends on 'swift-subprocess' 0.5.0..<2.0.0 because 'jsonfoundation' 3.2.0 depends on 'swift-subprocess' 0.5.0..<1.0.0 and 'jsonfoundation' 3.2.1 depends on 'swift-subprocess' 0.5.0..<2.0.0.
'jsonfoundation' {3.1.0..<3.2.0, 3.2.2..<4.0.0} practically depends on 'swift-subprocess' 0.5.0..<1.0.0 because no versions of 'jsonfoundation' match the requirement {3.1.1..<3.2.0, 3.2.2..<4.0.0} and 'jsonfoundation' 3.1.0 depends on 'swift-subprocess' 0.5.0..<1.0.0.
Command line invocation:
/Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Updating from https://github.com/swiftlang/swift-docc-plugin.git
Updating from https://github.com/Cocoanetics/SwiftCross.git
Updating from https://github.com/apple/swift-certificates.git
Updating from https://github.com/apple/swift-crypto.git
Updating from https://github.com/swiftlang/swift-syntax.git
Updating from https://github.com/Cocoanetics/JSONFoundation.git
Updating from https://github.com/swift-server/swift-service-lifecycle.git
Updating from https://github.com/apple/swift-nio-extras.git
Updating from https://github.com/apple/swift-nio.git
Updating from https://github.com/apple/swift-http-types.git
Updating from https://github.com/apple/swift-argument-parser.git
Updating from https://github.com/apple/swift-log.git
Updating from https://github.com/swiftlang/swift-subprocess.git
Resolved source packages:
spi-builder-workspace: (null)
2026-10-09 19:54:13.814 xcodebuild[1069:5211] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2026-09-10_19-54-0013.xcresult
xcodebuild: error: Could not resolve package dependencies:
Failed to resolve dependencies Dependencies could not be resolved because 'swift-subprocess' >= 0.5.0 contains incompatible tools version (6.2.0) and root depends on 'jsonfoundation' 3.1.0..<4.0.0.
'jsonfoundation' >= 3.1.0 practically depends on 'swift-subprocess' 0.5.0..<2.0.0 because 'jsonfoundation' 3.2.0 depends on 'swift-subprocess' 0.5.0..<1.0.0 and 'jsonfoundation' 3.2.1 depends on 'swift-subprocess' 0.5.0..<2.0.0.
'jsonfoundation' {3.1.0..<3.2.0, 3.2.2..<4.0.0} practically depends on 'swift-subprocess' 0.5.0..<1.0.0 because no versions of 'jsonfoundation' match the requirement {3.1.1..<3.2.0, 3.2.2..<4.0.0} and 'jsonfoundation' 3.1.0 depends on 'swift-subprocess' 0.5.0..<1.0.0.
BUILD FAILURE 6.1 macosXcodebuild