diff --git a/utils/kernel-service/BUILD.gn b/utils/kernel-service/BUILD.gn
index 6e7f7774e76..3d9a72a55e4 100644
--- a/utils/kernel-service/BUILD.gn
+++ b/utils/kernel-service/BUILD.gn
@@ -80,10 +80,10 @@ prebuilt_dart_action("kernel_service_dill") {
 
   depfile = "$root_gen_dir/kernel_service_dill.d"
   abs_depfile = rebase_path(depfile)
-  abs_output = rebase_path(output)
+  rebased_output = rebase_path(output, root_out_dir)
   vm_args = [
     "--depfile=$abs_depfile",
-    "--depfile_output_filename=$abs_output",
+    "--depfile_output_filename=$rebased_output",
   ]
 
   script = gen_kernel_script