diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..3dd5fcb
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "openshift-os-config"]
+	path = os
+	url = git@github.com:openshift/os.git
diff --git a/manifests/rocky-coreos.yaml b/manifests/rocky-coreos.yaml
index 86929df..d4ef094 100644
--- a/manifests/rocky-coreos.yaml
+++ b/manifests/rocky-coreos.yaml
@@ -8,53 +8,78 @@ add-commit-metadata:
   rocky-core.stream: ${stream}
 
 include:
-  - rocky-coreos-base.yaml
-
-conditional-include:
-  - if: basearch != "s390x"
-    # And remove some cruft from grub2
-    include: grub2-removals.yaml
-
-ostree-layers:
-  - overlay/15fcos
-
-automatic-version-prefix: "${releasever}.<date:%Y%m%d>.dev"
-mutate-os-release: "${releasever}"
-
-remove-from-packages:
-  # Drop NetworkManager support for ifcfg files, see also corresponding
-  # overlay.d/14NetworkManager-plugins
-  - [NetworkManager, /usr/lib64/NetworkManager/.*/libnm-settings-plugin-ifcfg-rh.so]
-  # Drop some buggy sysusers fragments which do not match static IDs allocation:
-  # https://bugzilla.redhat.com/show_bug.cgi?id=2105177
-  # - [dbus-common, /usr/lib/sysusers.d/dbus.conf]
-
-remove-files:
-  # We don't ship man(1) or info(1)
-  - usr/share/info
-  - usr/share/man
-  # Drop text docs too
-  - usr/share/doc
-
-# Things we don't expect to ship on the host.  We currently
-# have recommends: false so these could only come in via
-# hard requirement, in which case the build will fail.
-exclude-packages:
-  - python
-  - python2
-  - python2-libs
-  # - python3
-  # - python3-libs
-  - perl
-  - perl-interpreter
-  - nodejs
-  - dnf
-  - grubby
-  - cowsay  # Just in case
-  # Let's make sure initscripts doesn't get pulled back in
-  # https://github.com/coreos/fedora-coreos-tracker/issues/220#issuecomment-611566254
-  - initscripts
-  # For (datacenter/cloud oriented) servers, we want to see the details by default.
-  # https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/HSMISZ3ETWQ4ETVLWZQJ55ARZT27AAV3/
-  - plymouth
+  - os/manifest-rhel-coreos-9.yaml
 
+postprocess:
+  - |
+    #!/usr/bin/env bash
+    set -xeo pipefail
+    
+    # Tweak /usr/lib/os-release
+    grep -v "OSTREE_VERSION" /etc/os-release > /usr/lib/os-release.rhel
+    OCP_RELEASE="4.12"
+    (
+    . /etc/os-release
+    cat > /usr/lib/os-release <<EOF
+    NAME="${NAME} CoreOS"
+    ID="rhcos"
+    ID_LIKE="rhel fedora"
+    VERSION="${OSTREE_VERSION}"
+    VERSION_ID="${OCP_RELEASE}"
+    VARIANT="CoreOS"
+    VARIANT_ID=coreos
+    PLATFORM_ID="${PLATFORM_ID}"
+    PRETTY_NAME="${NAME} CoreOS ${OSTREE_VERSION} (Plow)"
+    ANSI_COLOR="${ANSI_COLOR}"
+    CPE_NAME="${CPE_NAME%baseos}coreos"
+    HOME_URL="${HOME_URL}"
+    DOCUMENTATION_URL="https://docs.openshift.com/container-platform/${OCP_RELEASE}/"
+    BUG_REPORT_URL="https://bugzilla.redhat.com/"
+    REDHAT_BUGZILLA_PRODUCT="OpenShift Container Platform"
+    REDHAT_BUGZILLA_PRODUCT_VERSION="${OCP_RELEASE}"
+    REDHAT_SUPPORT_PRODUCT="OpenShift Container Platform"
+    REDHAT_SUPPORT_PRODUCT_VERSION="${OCP_RELEASE}"
+    OPENSHIFT_VERSION="${OCP_RELEASE}"
+    RHEL_VERSION="${VERSION_ID}"
+    OSTREE_VERSION="${OSTREE_VERSION}"
+    EOF
+    )
+    rm -f /etc/os-release
+    ln -s ../usr/lib/os-release /etc/os-release
+    
+    # Tweak /etc/system-release, /etc/system-release-cpe & /etc/redhat-release
+    (
+    . /etc/os-release
+    cat > /usr/lib/system-release-cpe <<EOF
+    ${CPE_NAME}
+    EOF
+    cat > /usr/lib/system-release <<EOF
+    ${NAME} release ${VERSION_ID}
+    EOF
+    rm -f /etc/system-release-cpe /etc/system-release /etc/redhat-release
+    ln -s /usr/lib/system-release-cpe /etc/system-release-cpe
+    ln -s /usr/lib/system-release /etc/system-release
+    ln -s /usr/lib/system-release /etc/redhat-release
+    )
+    
+    # Tweak /usr/lib/issue
+    cat > /usr/lib/issue <<EOF
+    \S \S{VERSION_ID}
+    EOF
+    rm -f /etc/issue /etc/issue.net
+    ln -s /usr/lib/issue /etc/issue
+    ln -s /usr/lib/issue /etc/issue.net
+    
+    # Let's have a non-boring motd, just like CL (although theirs is more subdued
+    # nowadays compared to early versions with ASCII art).  One thing we do here
+    # is add --- as a "separator"; the idea is that any "dynamic" information should
+    # be below that.
+    # See: https://projects.engineering.redhat.com/browse/COREOS-1029
+    . /etc/os-release
+    cat > /etc/motd <<EOF
+    Rocky Linux CoreOS $VERSION
+    
+    WARNING: Direct SSH access to machines is not recommended;
+    
+    ---
+    EOF
\ No newline at end of file
diff --git a/os b/os
new file mode 160000
index 0000000..de8da21
--- /dev/null
+++ b/os
@@ -0,0 +1 @@
+Subproject commit de8da2165b6af189df27a493ceeaa806091605eb