diff --git a/.gitignore b/.gitignore
index 2c0658b..51ae994 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,8 @@
 /.swiftpm
 /.build
 /Packages
-swift-system.xcodeproj
+/*.xcodeproj
 xcuserdata/
 .*.sw?
+/.swiftpm
 .docc-build
diff --git a/Package.swift b/Package.swift
index 4a3c2c4..857c502 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,10 +1,9 @@
-// swift-tools-version:5.6
-// The swift-tools-version declares the minimum version of Swift required to build this package.
+// swift-tools-version:5.8
 
 /*
  This source file is part of the Swift System open source project
 
- Copyright (c) 2020 Apple Inc. and the Swift System project authors
+ Copyright (c) 2020-2024 Apple Inc. and the Swift System project authors
  Licensed under Apache License v2.0 with Runtime Library Exception
 
  See https://swift.org/LICENSE.txt for license information
@@ -47,6 +46,6 @@ let package = Package(
         swiftSettings: [
           .define("SYSTEM_PACKAGE"),
           .define("SYSTEM_PACKAGE_DARWIN", .when(platforms: DarwinPlatforms)),
-        ])
+        ]),
     ]
 )
diff --git a/README.md b/README.md
index 14edea0..b5b5535 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ To use the `SystemPackage` library in a SwiftPM project,
 add the following line to the dependencies in your `Package.swift` file:
 
 ```swift
-.package(url: "https://github.com/apple/swift-system", from: "1.0.0"),
+.package(url: "https://github.com/apple/swift-system", from: "1.3.0"),
 ```
 
 Finally, include `"SystemPackage"` as a dependency for your executable target:
@@ -39,7 +39,7 @@ Finally, include `"SystemPackage"` as a dependency for your executable target:
 let package = Package(
     // name, platforms, products, etc.
     dependencies: [
-        .package(url: "https://github.com/apple/swift-system", from: "1.0.0"),
+        .package(url: "https://github.com/apple/swift-system", from: "1.3.0"),
         // other dependencies
     ],
     targets: [
diff --git a/Sources/System/CMakeLists.txt b/Sources/System/CMakeLists.txt
index f7c038b..1f3420a 100644
--- a/Sources/System/CMakeLists.txt
+++ b/Sources/System/CMakeLists.txt
@@ -41,6 +41,10 @@ target_sources(SystemPackage PRIVATE
 target_link_libraries(SystemPackage PUBLIC
   CSystem)
 
+set(SWIFT_SYSTEM_APPLE_PLATFORMS "Darwin" "iOS" "watchOS" "tvOS" "visionOS")
+if(CMAKE_SYSTEM_NAME IN_LIST SWIFT_SYSTEM_APPLE_PLATFORMS)
+  target_compile_definitions(SystemPackage PRIVATE SYSTEM_PACKAGE_DARWIN)
+endif()
 
 _install_target(SystemPackage)
 set_property(GLOBAL APPEND PROPERTY SWIFT_SYSTEM_EXPORTS SystemPackage)