diff --git a/build.py b/build.py
index 76cefb2..2608387 100755
--- a/build.py
+++ b/build.py
@@ -230,7 +230,7 @@ class DockerBuilder:
     ) -> str:
         if self.registry:
             registry = self.registry.rstrip("/") + "/"
-            alt_image = "alt/alt"
+            alt_image = "base/alt"
         else:
             registry = ""
             alt_image = "alt"
@@ -307,7 +307,7 @@ class DockerBuilder:
                             f"{from_image['organization']}/{from_image['name']}"
                         )
         elif distrolessfile.exists():
-            requires.add("alt/distroless-builder")
+            requires.add("base/distroless-builder")
             raw_from = self.distrolesses[canonical_name].raw_from
             from_ = self.render_template(raw_from, self.organization)
             if match := re.match(self.image_re, from_):
@@ -345,7 +345,7 @@ class DockerBuilder:
     def distroless_build(self, image: Image, arches):
         def distroless_build_arch(arch, manifest):
             distroless_builder = self.render_full_tag(
-                Image("alt/distroless-builder"), self.branch
+                Image("base/distroless-builder"), self.branch
             )
             distroless = self.distrolesses[image.canonical_name]
             distroless.render_arch_branch(arch, self.branch)