diff --git a/skylib/kustomize/kustomize.bzl b/skylib/kustomize/kustomize.bzl
index 61980333..a6f13b75 100644
--- a/skylib/kustomize/kustomize.bzl
+++ b/skylib/kustomize/kustomize.bzl
@@ -45,7 +45,7 @@ sh_binary(
     ctx.download_and_extract(filename, "bin/", sha256 = sha256)
 
 _download_binary = repository_rule(
-    implementation = _download_binary_impl,
+    _download_binary_impl,
 )
 
 def kustomize_setup(name):