diff --git a/Sources/BuildSystemIntegration/SwiftPMBuildSystem.swift b/Sources/BuildSystemIntegration/SwiftPMBuildSystem.swift
index 96d9c3e4c..5eaf798a5 100644
--- a/Sources/BuildSystemIntegration/SwiftPMBuildSystem.swift
+++ b/Sources/BuildSystemIntegration/SwiftPMBuildSystem.swift
@@ -203,7 +203,7 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
       throw Error.cannotDetermineHostToolchain
     }
 
-    var absProjectRoot = try AbsolutePath(validating: projectRoot.filePath)
+    let absProjectRoot = try AbsolutePath(validating: projectRoot.filePath)
     let hostSDK = try SwiftSDK.hostSwiftSDK(AbsolutePath(validating: destinationToolchainBinDir.filePath))
     let hostSwiftPMToolchain = try UserToolchain(swiftSDK: hostSDK)
 
@@ -237,10 +237,10 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
       fileSystem: localFileSystem
     )
 
-    if options.backgroundIndexingOrDefault {
-      location.scratchDirectory = absProjectRoot.appending(components: ".build", "index-build")
-    } else if let scratchDirectory = options.swiftPMOrDefault.scratchPath {
+    if let scratchDirectory = options.swiftPMOrDefault.scratchPath {
       location.scratchDirectory = try AbsolutePath(validating: scratchDirectory, relativeTo: absProjectRoot)
+    } else if options.backgroundIndexingOrDefault {
+      location.scratchDirectory = absProjectRoot.appending(components: ".build", "index-build")
     }
 
     var configuration = WorkspaceConfiguration.default
diff --git a/Sources/InProcessClient/InProcessSourceKitLSPClient.swift b/Sources/InProcessClient/InProcessSourceKitLSPClient.swift
index a4628c3be..6ee01360f 100644
--- a/Sources/InProcessClient/InProcessSourceKitLSPClient.swift
+++ b/Sources/InProcessClient/InProcessSourceKitLSPClient.swift
@@ -15,7 +15,7 @@ public import Foundation
 public import LanguageServerProtocol
 import LanguageServerProtocolExtensions
 import SKLogging
-package import SKOptions
+public import SKOptions
 package import SourceKitLSP
 import SwiftExtensions
 import TSCExtensions
@@ -31,13 +31,14 @@ public final class InProcessSourceKitLSPClient: Sendable {
 
   public convenience init(
     toolchainPath: URL?,
+    options: SourceKitLSPOptions = SourceKitLSPOptions(),
     capabilities: ClientCapabilities = ClientCapabilities(),
     workspaceFolders: [WorkspaceFolder],
     messageHandler: any MessageHandler
   ) async throws {
     try await self.init(
       toolchainRegistry: ToolchainRegistry(installPath: toolchainPath),
-      options: SourceKitLSPOptions(),
+      options: options,
       capabilities: capabilities,
       workspaceFolders: workspaceFolders,
       messageHandler: messageHandler
diff --git a/Sources/SemanticIndex/PreparationTaskDescription.swift b/Sources/SemanticIndex/PreparationTaskDescription.swift
index 841c81bf1..b4262d7b7 100644
--- a/Sources/SemanticIndex/PreparationTaskDescription.swift
+++ b/Sources/SemanticIndex/PreparationTaskDescription.swift
@@ -63,9 +63,10 @@ package struct PreparationTaskDescription: IndexTaskDescription {
     targetsToPrepare: [BuildTargetIdentifier],
     buildSystemManager: BuildSystemManager,
     preparationUpToDateTracker: UpToDateTracker<BuildTargetIdentifier, DummySecondaryKey>,
-    logMessageToIndexLog: @escaping @Sendable (
-      _ message: String, _ type: WindowMessageType, _ structure: StructuredLogKind
-    ) -> Void,
+    logMessageToIndexLog:
+      @escaping @Sendable (
+        _ message: String, _ type: WindowMessageType, _ structure: StructuredLogKind
+      ) -> Void,
     hooks: IndexHooks
   ) {
     self.targetsToPrepare = targetsToPrepare
diff --git a/Sources/SemanticIndex/SemanticIndexManager.swift b/Sources/SemanticIndex/SemanticIndexManager.swift
index 9699a480f..67257cd2f 100644
--- a/Sources/SemanticIndex/SemanticIndexManager.swift
+++ b/Sources/SemanticIndex/SemanticIndexManager.swift
@@ -261,9 +261,10 @@ package final actor SemanticIndexManager {
     updateIndexStoreTimeout: Duration,
     hooks: IndexHooks,
     indexTaskScheduler: TaskScheduler<AnyIndexTaskDescription>,
-    logMessageToIndexLog: @escaping @Sendable (
-      _ message: String, _ type: WindowMessageType, _ structure: StructuredLogKind
-    ) -> Void,
+    logMessageToIndexLog:
+      @escaping @Sendable (
+        _ message: String, _ type: WindowMessageType, _ structure: StructuredLogKind
+      ) -> Void,
     indexTasksWereScheduled: @escaping @Sendable (Int) -> Void,
     indexProgressStatusDidChange: @escaping @Sendable () -> Void
   ) {
diff --git a/Sources/SemanticIndex/UpdateIndexStoreTaskDescription.swift b/Sources/SemanticIndex/UpdateIndexStoreTaskDescription.swift
index 319341b71..7bd2362c9 100644
--- a/Sources/SemanticIndex/UpdateIndexStoreTaskDescription.swift
+++ b/Sources/SemanticIndex/UpdateIndexStoreTaskDescription.swift
@@ -146,9 +146,10 @@ package struct UpdateIndexStoreTaskDescription: IndexTaskDescription {
     index: UncheckedIndex,
     indexStoreUpToDateTracker: UpToDateTracker<DocumentURI, BuildTargetIdentifier>,
     indexFilesWithUpToDateUnit: Bool,
-    logMessageToIndexLog: @escaping @Sendable (
-      _ message: String, _ type: WindowMessageType, _ structure: StructuredLogKind
-    ) -> Void,
+    logMessageToIndexLog:
+      @escaping @Sendable (
+        _ message: String, _ type: WindowMessageType, _ structure: StructuredLogKind
+      ) -> Void,
     timeout: Duration,
     hooks: IndexHooks
   ) {
diff --git a/Sources/SourceKitLSP/SourceKitLSPServer.swift b/Sources/SourceKitLSP/SourceKitLSPServer.swift
index e21bffc95..1dd4aee1b 100644
--- a/Sources/SourceKitLSP/SourceKitLSPServer.swift
+++ b/Sources/SourceKitLSP/SourceKitLSPServer.swift
@@ -390,9 +390,10 @@ package actor SourceKitLSPServer {
 
   private func handleRequest<RequestType: TextDocumentRequest>(
     for request: RequestAndReply<RequestType>,
-    requestHandler: @Sendable @escaping (
-      RequestType, Workspace, LanguageService
-    ) async throws ->
+    requestHandler:
+      @Sendable @escaping (
+        RequestType, Workspace, LanguageService
+      ) async throws ->
       RequestType.Response
   ) async {
     await request.reply {