diff --git a/Package.swift b/Package.swift
index b87f3c1..bc3766b 100644
--- a/Package.swift
+++ b/Package.swift
@@ -2,6 +2,7 @@
 
 import PackageDescription
 import Foundation
+#if os(Windows)
 import WinSDK
 
 let swiftc = "swiftc.exe".withCString(encodedAs: UTF16.self) { pwszCompiler in
@@ -17,6 +18,11 @@ let include = URL(fileURLWithPath: swiftc).deletingLastPathComponent()
                                           .withUnsafeFileSystemRepresentation {
   String(cString: $0!)
 }
+#else
+let include = ""
+#warning("This package will only compile on Windows.")
+#endif
+
 
 let SwiftFirebase =
     Package(name: "SwiftFirebase",