diff --git a/oci/defs.bzl b/oci/defs.bzl
index 176ae181..f7559e77 100644
--- a/oci/defs.bzl
+++ b/oci/defs.bzl
@@ -141,7 +141,7 @@ def oci_image(name, labels = None, annotations = None, env = None, cmd = None, e
         name = name + ".digest",
         args = ["--raw-output"],
         srcs = ["_{}_index.json".format(name)],
-        filter = """.manifests[0].digest | sub("^sha256:"; "")""",
+        filter = """.manifests[0].digest""",
         out = name + ".json.sha256",  # path chosen to match rules_docker for easy migration
         tags = propagate_well_known_tags(tags),
     )