diff --git a/Sources/SWBCore/SpecImplementations/Tools/SwiftCompiler.swift b/Sources/SWBCore/SpecImplementations/Tools/SwiftCompiler.swift
index e98eb403..4b056ca8 100644
--- a/Sources/SWBCore/SpecImplementations/Tools/SwiftCompiler.swift
+++ b/Sources/SWBCore/SpecImplementations/Tools/SwiftCompiler.swift
@@ -21,6 +21,11 @@ public import enum SWBProtocol.BuildAction
 import Foundation
 public import SWBMacro
 
+#if canImport(Darwin) && canImport(os.log)
+// For Previews logging
+import os.log
+#endif
+
 /// The minimal data we need to serialize to reconstruct `SwiftSourceFileIndexingInfo` from `generateIndexingInfoForTask`
 public struct SwiftIndexingPayload: Serializable, Sendable {
     // If `USE_SWIFT_RESPONSE_FILE` is enabled, we use `filePaths`, otherwise `range`.
@@ -3548,6 +3553,7 @@ public final class SwiftCompilerSpec : CompilerSpec, SpecIdentifierType, SwiftDi
                     let overlay = try vfs.toVFSOverlay().propertyListItem.asJSONFragment().asString
                     try fs.write(newVFSOverlayPath!, contents: ByteString(encodingAsUTF8: overlay))
                 } catch {
+                    logErrorForPreviews("Failed to generate vfsoverlay for \(inputPath.basename), error: \(error)")
                     return []
                 }
             } else {
@@ -3628,11 +3634,10 @@ public final class SwiftCompilerSpec : CompilerSpec, SpecIdentifierType, SwiftDi
 
             // The driver may have emitted an error even if it returned us a command line. In this case, don't return the command line since it likely won't work.
             if commandLine.isEmpty || outputDelegate.engine.hasErrors {
-                #if canImport(os)
+                logErrorForPreviews("Swift driver failed to compute command line for preview info.")
                 for diagnostic in outputDelegate.engine.diagnostics.filter({ $0.behavior == .error }) {
-                    OSLog.log("Swift driver preview info error: \(diagnostic.data.description)")
+                    logErrorForPreviews("Swift driver preview info error: \(diagnostic.data.description)")
                 }
-                #endif
                 return []
             }
         }
@@ -3959,3 +3964,14 @@ extension SwiftDiscoveredCommandLineToolSpecInfo {
         return try await discoveredSwiftCompilerInfo(producer, delegate, at: toolPath, blocklistsPathOverride: userSpecifiedBlocklists)
     }
 }
+
+#if canImport(Darwin) && canImport(os.log)
+let previewsLogger = Logger(subsystem: "com.apple.dt.Previews", category: "swift-build")
+#endif
+
+private func logErrorForPreviews(_ message: @autoclosure () -> String) {
+#if canImport(Darwin) && canImport(os.log)
+    let resolved = message()
+    previewsLogger.error("\(resolved, privacy: .private)")
+#endif
+}