diff --git a/Sources/SwiftBuildSupport/SwiftBuildSystem.swift b/Sources/SwiftBuildSupport/SwiftBuildSystem.swift
index ab9cdd044f4..7ad4e627c1c 100644
--- a/Sources/SwiftBuildSupport/SwiftBuildSystem.swift
+++ b/Sources/SwiftBuildSupport/SwiftBuildSystem.swift
@@ -1017,6 +1017,7 @@ public final class SwiftBuildSystem: SPMBuildCore.BuildSystem {
         request.hideShellScriptEnvironment = true
         request.showNonLoggedProgress = true
         request.recordBuildBacktraces = buildParameters.outputParameters.enableTaskBacktraces
+        request.schedulerLaneWidthOverride = buildParameters.workers
 
         // Override the arena. We need to apply the arena info to both the request-global build
         // parameters as well as the target-specific build parameters, since they may have been