diff --git a/Containerfile b/Containerfile
index 9b5990327e..c86846fcbe 100644
--- a/Containerfile
+++ b/Containerfile
@@ -29,6 +29,8 @@ COPY usr /usr
 
 # Copy public key
 COPY cosign.pub /usr/etc/pki/containers/cosign.pub
+# Copy base signing config
+COPY usr/etc/containers /usr/etc/
 
 # Copy the recipe that we're building.
 COPY ${RECIPE} /usr/share/ublue-os/recipe.yml
diff --git a/scripts/build.sh b/scripts/build.sh
index 3f2561552c..b6d5ac6622 100644
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -22,6 +22,12 @@ YAFTI_ENABLED="$(get_yaml_string '.firstboot.yafti')"
 # Welcome.
 echo "Building custom Fedora ${FEDORA_VERSION} from image: \"${BASE_IMAGE}\"."
 
+# Setup container signing
+echo "Setup container signing in policy.json and cosign.yaml"
+echo "Registry to write: $IMAGE_REGISTRY"
+sed -i "s ghcr.io/ublue-os $IMAGE_REGISTRY g" /usr/etc/containers/policy.json
+sed -i "s ghcr.io/ublue-os $IMAGE_REGISTRY g" /usr/etc/containers/registries.d/cosign.yaml
+
 # Add custom repos.
 get_yaml_array repos '.rpm.repos[]'
 if [[ ${#repos[@]} -gt 0 ]]; then
@@ -105,20 +111,5 @@ if [[ "${YAFTI_ENABLED}" == "true" ]]; then
     fi
 fi
 
-# Setup container signing
-echo "Setup container signing in policy.json and cosign.yaml"
-echo "Registry to write: $IMAGE_REGISTRY"
-
-jq '.transports.docker."$IMAGE_REGISTRY" += [{
-    "type": "sigstoreSigned",
-    "keyPath": "/usr/etc/pki/containers/cosign.pub",
-    "signedIdentity": {
-        "type": "matchRepository"
-    }
-}]' /usr/etc/containers/policy.json > /usr/etc/containers/policy.json
-
-cp /usr/etc/containers/registries.d/ublue-os.yaml /usr/etc/containers/registries.d/cosign.yaml
-sed -i "s ghcr.io/ublue-os $IMAGE_REGISTRY g" /usr/etc/containers/registries.d/cosign.yaml
-
 # Run "post" scripts.
 run_scripts "post"
diff --git a/usr/etc/containers/policy.json b/usr/etc/containers/policy.json
new file mode 100644
index 0000000000..aa4e3ee162
--- /dev/null
+++ b/usr/etc/containers/policy.json
@@ -0,0 +1,74 @@
+{
+    "default": [
+        {
+            "type": "reject"
+        }
+    ],
+    "transports": {
+        "docker": {
+            "registry.access.redhat.com": [
+                {
+                    "type": "signedBy",
+                    "keyType": "GPGKeys",
+                    "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
+                }
+            ],
+            "registry.redhat.io": [
+                {
+                    "type": "signedBy",
+                    "keyType": "GPGKeys",
+                    "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
+                }
+            ],
+            "ghcr.io/ublue-os": [
+                {
+                    "type": "sigstoreSigned",
+                    "keyPath": "/usr/etc/pki/containers/cosign.pub",
+                    "signedIdentity": {
+                        "type": "matchRepository"
+                    }
+                }
+            ],
+            "": [
+                {
+                    "type": "insecureAcceptAnything"
+                }
+            ]
+        },
+        "docker-daemon": {
+            "": [
+                {
+                    "type": "insecureAcceptAnything"
+                }
+            ]
+        },
+        "atomic": {
+            "": [
+                {
+                    "type": "insecureAcceptAnything"
+                }
+            ]
+        },
+        "dir": {
+            "": [
+                {
+                    "type": "insecureAcceptAnything"
+                }
+            ]
+        },
+        "oci": {
+            "": [
+                {
+                    "type": "insecureAcceptAnything"
+                }
+            ]
+        },
+        "tarball": {
+            "": [
+                {
+                    "type": "insecureAcceptAnything"
+                }
+            ]
+        }
+    }
+}
diff --git a/usr/etc/containers/registries.d/cosign.yaml b/usr/etc/containers/registries.d/cosign.yaml
new file mode 100644
index 0000000000..24b197fa1a
--- /dev/null
+++ b/usr/etc/containers/registries.d/cosign.yaml
@@ -0,0 +1,3 @@
+docker:
+  ghcr.io/ublue-os:
+    use-sigstore-attachments: true