diff --git a/manifests/function/airshipctl-base-catalogues/versions-airshipctl.yaml b/manifests/function/airshipctl-base-catalogues/versions-airshipctl.yaml
index 7d379d1df..cb646c081 100644
--- a/manifests/function/airshipctl-base-catalogues/versions-airshipctl.yaml
+++ b/manifests/function/airshipctl-base-catalogues/versions-airshipctl.yaml
@@ -155,5 +155,9 @@ spec:
       webhook:
         manager:
           image: quay.io/jetstack/cert-manager-webhook:v1.1.0
+    image_builder:
+      image_builder:
+        image_builder:
+          image: quay.io/airshipit/image-builder:latest-ubuntu_focal
 
   kubernetes: v1.18.6
diff --git a/manifests/phases/replacements/kustomization.yaml b/manifests/phases/replacements/kustomization.yaml
new file mode 100644
index 000000000..1d43ee154
--- /dev/null
+++ b/manifests/phases/replacements/kustomization.yaml
@@ -0,0 +1,4 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - versions.yaml
diff --git a/manifests/phases/replacements/versions.yaml b/manifests/phases/replacements/versions.yaml
new file mode 100644
index 000000000..9d8c924a1
--- /dev/null
+++ b/manifests/phases/replacements/versions.yaml
@@ -0,0 +1,20 @@
+apiVersion: airshipit.org/v1alpha1
+kind: ReplacementTransformer
+metadata:
+  name: image-builder-versions-replacements
+  annotations:
+    config.kubernetes.io/function: |-
+      container:
+        image: localhost/replacement-transformer
+replacements:
+- source:
+    objref:
+      kind: VersionsCatalogue
+      name: versions-airshipctl
+    fieldref: spec.images.image_builder.image_builder.image_builder.image
+  target:
+    objref:
+      kind: GenericContainer
+      name: iso-build-image
+    fieldrefs: ["spec.image"]
+
diff --git a/manifests/site/az-test-site/phases/kustomization.yaml b/manifests/site/az-test-site/phases/kustomization.yaml
index ed13ef0c1..5876c4f20 100644
--- a/manifests/site/az-test-site/phases/kustomization.yaml
+++ b/manifests/site/az-test-site/phases/kustomization.yaml
@@ -12,3 +12,4 @@ patchesJson6902:
     path: infrastructure-providers.json
 transformers:
   - ../../../function/clusterctl/replacements
+  - ../../../phases/replacements
diff --git a/manifests/site/docker-test-site/phases/kustomization.yaml b/manifests/site/docker-test-site/phases/kustomization.yaml
index ed13ef0c1..5876c4f20 100644
--- a/manifests/site/docker-test-site/phases/kustomization.yaml
+++ b/manifests/site/docker-test-site/phases/kustomization.yaml
@@ -12,3 +12,4 @@ patchesJson6902:
     path: infrastructure-providers.json
 transformers:
   - ../../../function/clusterctl/replacements
+  - ../../../phases/replacements
diff --git a/manifests/site/gcp-test-site/phases/kustomization.yaml b/manifests/site/gcp-test-site/phases/kustomization.yaml
index ed13ef0c1..5876c4f20 100644
--- a/manifests/site/gcp-test-site/phases/kustomization.yaml
+++ b/manifests/site/gcp-test-site/phases/kustomization.yaml
@@ -12,3 +12,4 @@ patchesJson6902:
     path: infrastructure-providers.json
 transformers:
   - ../../../function/clusterctl/replacements
+  - ../../../phases/replacements
diff --git a/manifests/site/openstack-test-site/phases/kustomization.yaml b/manifests/site/openstack-test-site/phases/kustomization.yaml
index ed13ef0c1..5876c4f20 100644
--- a/manifests/site/openstack-test-site/phases/kustomization.yaml
+++ b/manifests/site/openstack-test-site/phases/kustomization.yaml
@@ -12,3 +12,4 @@ patchesJson6902:
     path: infrastructure-providers.json
 transformers:
   - ../../../function/clusterctl/replacements
+  - ../../../phases/replacements
diff --git a/manifests/site/test-site/phases/kustomization.yaml b/manifests/site/test-site/phases/kustomization.yaml
index a519d307a..6bfeab610 100644
--- a/manifests/site/test-site/phases/kustomization.yaml
+++ b/manifests/site/test-site/phases/kustomization.yaml
@@ -6,3 +6,4 @@ resources:
 transformers:
   - ../../../function/clusterctl/replacements
   - ../../../function/bootstrap/replacements
+  - ../../../phases/replacements