diff --git a/Sources/InContextCore/Extensions/URL.swift b/Sources/InContextCore/Extensions/URL.swift
index 0bdb746..b109b12 100644
--- a/Sources/InContextCore/Extensions/URL.swift
+++ b/Sources/InContextCore/Extensions/URL.swift
@@ -77,3 +77,26 @@ extension URL {
     }
 
 }
+
+#if os(Linux)
+
+enum DirectoryHint {
+
+    case isDirectory
+    case notDirectory
+
+}
+
+extension URL {
+
+    init(filePath: String, directoryHint: DirectoryHint = .notDirectory) {
+        self.init(fileURLWithPath: filePath, isDirectory: directoryHint == .isDirectory ? true : false)
+    }
+
+    init(filePath: String, relativeTo url: URL?) {
+        self.init(fileURLWithPath: filePath, relativeTo: url)
+    }
+
+}
+
+#endif
diff --git a/Sources/InContextCore/Utilities/ChangeObserver.swift b/Sources/InContextCore/Utilities/ChangeObserver.swift
index 22c526d..15a519e 100644
--- a/Sources/InContextCore/Utilities/ChangeObserver.swift
+++ b/Sources/InContextCore/Utilities/ChangeObserver.swift
@@ -26,25 +26,6 @@ import Foundation
 import FSEventsWrapper
 #endif
 
-enum DirectoryHint {
-
-    case isDirectory
-    case notDirectory
-
-}
-
-extension URL {
-
-    init(filePath: String, directoryHint: DirectoryHint = .notDirectory) {
-        self.init(fileURLWithPath: filePath, isDirectory: directoryHint == .isDirectory ? true : false)
-    }
-
-    init(filePath: String, relativeTo url: URL?) {
-        self.init(fileURLWithPath: filePath, relativeTo: url)
-    }
-
-}
-
 class ChangeObserver {
 
     let box: ConcurrentBox<Bool>