diff --git a/container/image.bzl b/container/image.bzl
index 2e750bf7d..c67ccaae7 100644
--- a/container/image.bzl
+++ b/container/image.bzl
@@ -229,8 +229,8 @@ def _assemble_image_digest(ctx, name, image, image_tarball, output_digest):
 
     ctx.actions.run(
         outputs = [output_digest],
-        tools = [image["config"]] + blobsums + blobs +
-                ([image["legacy"]] if image.get("legacy") else []),
+        inputs = [image["config"]] + blobsums + blobs +
+                 ([image["legacy"]] if image.get("legacy") else []),
         executable = ctx.executable._digester,
         arguments = arguments,
         mnemonic = "ImageDigest",