From 91940cf26f0c5266102239be3f2c65f2d92ca7d2 Mon Sep 17 00:00:00 2001
From: Stuart Montgomery <smontgomery@apple.com>
Date: Mon, 9 Oct 2023 14:31:13 -0500
Subject: [PATCH] Switch from unsafeFlags to enableExperimentalFeature to
 enable strict concurrency checking

---
 Package.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Package.swift b/Package.swift
index 2aa95ecf4..cdc44978f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -111,7 +111,6 @@ extension Array where Element == PackageDescription.SwiftSetting {
   static var packageSettings: Self {
     [
       .unsafeFlags([
-        "-strict-concurrency=complete",
         "-require-explicit-sendable",
 
         "-Xfrontend", "-define-availability", "-Xfrontend", "_clockAPI:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0",
@@ -119,6 +118,7 @@ extension Array where Element == PackageDescription.SwiftSetting {
         "-Xfrontend", "-define-availability", "-Xfrontend", "_regexAPI:macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0",
         "-Xfrontend", "-define-availability", "-Xfrontend", "_swiftVersionAPI:macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0",
       ]),
+      .enableExperimentalFeature("StrictConcurrency"),
       .enableUpcomingFeature("ExistentialAny"),
       .define("SWT_TARGET_OS_APPLE", .when(platforms: [.macOS, .iOS, .macCatalyst, .watchOS, .tvOS, .visionOS])),
     ]