1 files changed, 7 insertions, 0 deletions
diff --git a/lib/std/Build/Cache.zig b/lib/std/Build/Cache.zig
index bb36bb978f..1ad111f2e3 100644
--- a/lib/std/Build/Cache.zig
+++ b/lib/std/Build/Cache.zig
@@ -9,6 +9,13 @@ pub const Directory = struct {
     path: ?[]const u8,
     handle: fs.Dir,
 
+    pub fn clone(d: Directory, arena: Allocator) Allocator.Error!Directory {
+        return .{
+            .path = if (d.path) |p| try arena.dupe(u8, p) else null,
+            .handle = d.handle,
+        };
+    }
+
     pub fn cwd() Directory {
         return .{
             .path = null,