diff --git a/Package.swift b/Package.swift
index 4c6e4ab2..b081a872 100644
--- a/Package.swift
+++ b/Package.swift
@@ -12,31 +12,32 @@
 
 import PackageDescription
 
-let targets: [PackageDescription.Target] = [
-  .target(
-    name: "SystemPackage",
-    dependencies: ["CSystem"],
-    path: "Sources/System",
-    swiftSettings: [
-      .define("SYSTEM_PACKAGE"),
-      .define("ENABLE_MOCKING", .when(configuration: .debug))
-    ]),
-  .target(
-    name: "CSystem",
-    dependencies: []),
-  .testTarget(
-    name: "SystemTests",
-    dependencies: ["SystemPackage"],
-    swiftSettings: [
-      .define("SYSTEM_PACKAGE")
-    ]),
-]
-
 let package = Package(
     name: "swift-system",
     products: [
         .library(name: "SystemPackage", targets: ["SystemPackage"]),
     ],
     dependencies: [],
-    targets: targets
+    targets: [
+      .target(
+        name: "CSystem",
+        dependencies: []),
+      .target(
+        name: "SystemPackage",
+        dependencies: ["CSystem"],
+        path: "Sources/System",
+        cSettings: [
+          .define("_CRT_SECURE_NO_WARNINGS")
+        ],
+        swiftSettings: [
+          .define("SYSTEM_PACKAGE"),
+          .define("ENABLE_MOCKING", .when(configuration: .debug))
+        ]),
+      .testTarget(
+        name: "SystemTests",
+        dependencies: ["SystemPackage"],
+        swiftSettings: [
+          .define("SYSTEM_PACKAGE")
+        ]),
+    ]
 )
diff --git a/Sources/System/Internals/Mocking.swift b/Sources/System/Internals/Mocking.swift
index 4c74b6a4..eb1fe834 100644
--- a/Sources/System/Internals/Mocking.swift
+++ b/Sources/System/Internals/Mocking.swift
@@ -146,7 +146,7 @@ private func originalSyscallName(_ function: String) -> String {
 
 private func mockImpl(
   name: String,
-  path: UnsafePointer<CChar>?,
+  path: UnsafePointer<CInterop.PlatformChar>?,
   _ args: [AnyHashable]
 ) -> CInt {
   precondition(mockingEnabled)
@@ -177,18 +177,18 @@ private func mockImpl(
 }
 
 internal func _mock(
-  name: String = #function, path: UnsafePointer<CChar>? = nil, _ args: AnyHashable...
+  name: String = #function, path: UnsafePointer<CInterop.PlatformChar>? = nil, _ args: AnyHashable...
 ) -> CInt {
   return mockImpl(name: name, path: path, args)
 }
 internal func _mockInt(
-  name: String = #function, path: UnsafePointer<CChar>? = nil, _ args: AnyHashable...
+  name: String = #function, path: UnsafePointer<CInterop.PlatformChar>? = nil, _ args: AnyHashable...
 ) -> Int {
   Int(mockImpl(name: name, path: path, args))
 }
 
 internal func _mockOffT(
-  name: String = #function, path: UnsafePointer<CChar>? = nil, _ args: AnyHashable...
+  name: String = #function, path: UnsafePointer<CInterop.PlatformChar>? = nil, _ args: AnyHashable...
 ) -> _COffT {
   _COffT(mockImpl(name: name, path: path, args))
 }