diff --git a/build-rootfs-size-docker.sh b/build-rootfs-size-docker.sh
index 056f1ea..ce64076 100755
--- a/build-rootfs-size-docker.sh
+++ b/build-rootfs-size-docker.sh
@@ -10,8 +10,8 @@
 #                     default ones in /etc/apt/sources.list
 #                     default is empty, and no mirror is used.
 #   DOCKER_REG:       <optional, the URL of a docker registry to utilize
-#                     instead of the default docker hub
-#                     (ex. public.ecr.aws/ubuntu)
+#                     instead of our default (public.ecr.aws/ubuntu)
+#                     (ex. docker.io)
 #   http_proxy:       The HTTP address of the proxy server to connect to.
 #                     Default: "", proxy is not setup if this is not set
 
@@ -22,7 +22,7 @@
 
 DOCKER_IMG_NAME=${DOCKER_IMG_NAME:-"openbmc/ubuntu-rootfs-size"}
 DISTRO=${DISTRO:-"ubuntu:bionic"}
-docker_reg=${DOCKER_REG:-"docker.io"}
+docker_reg=${DOCKER_REG:-"public.ecr.aws/ubuntu"}
 
 PROXY=""
 
diff --git a/build-setup.sh b/build-setup.sh
index f9b9df9..c435ae7 100755
--- a/build-setup.sh
+++ b/build-setup.sh
@@ -24,8 +24,8 @@
 #  CONTAINER_ONLY     Set to "true" if you only want to build the docker
 #                     container. The bitbake will not occur in this case.
 #  DOCKER_REG:        <optional, the URL of a docker registry to utilize
-#                     instead of the default docker hub
-#                     (ex. public.ecr.aws/ubuntu or public.ecr.aws/docker/library)
+#                     instead of our default (public.ecr.aws/ubuntu)
+#                     (ex. docker.io or public.ecr.aws/docker/library)
 #
 # Docker Image Build Variables:
 #  BITBAKE_OPTS       Set to "-c populate_sdk" or whatever other BitBake options
@@ -35,7 +35,8 @@
 #                     container, path cannot be located on network storage.
 #                     Default: "$WORKSPACE/build"
 #  distro             The distro used as the base image for the build image:
-#                     fedora|ubuntu
+#                     fedora|ubuntu. Note that if you chose fedora, you will
+#                     need to also update DOCKER_REG to a supported fedora reg.
 #                     Default: "ubuntu"
 #  img_name           The name given to the target build's docker image.
 #                     Default: "openbmc/${distro}:${imgtag}-${target}-${ARCH}"
@@ -90,7 +91,7 @@
 UBUNTU_MIRROR=${UBUNTU_MIRROR:-""}
 ENV_LOCAL_CONF=${ENV_LOCAL_CONF:-""}
 container_only=${CONTAINER_ONLY:-false}
-docker_reg=${DOCKER_REG:-"docker.io"}
+docker_reg=${DOCKER_REG:-"public.ecr.aws/ubuntu"}
 
 # Docker Image Build Variables:
 build_dir=${build_dir:-${WORKSPACE}/build}
diff --git a/qemu-build.sh b/qemu-build.sh
index 54044e7..5baa02e 100755
--- a/qemu-build.sh
+++ b/qemu-build.sh
@@ -22,8 +22,8 @@
 #  WORKSPACE          Path of the workspace directory where the build will
 #                     occur, and output artifacts will be produced.
 #  DOCKER_REG:        <optional, the URL of a docker registry to utilize
-#                     instead of the default docker hub
-#                     (ex. public.ecr.aws/ubuntu)
+#                     instead of our default (public.ecr.aws/ubuntu)
+#                     (ex. docker.io)
 #
 ###############################################################################
 # Trace bash processing
@@ -37,7 +37,7 @@
     exit 1
 fi
 
-docker_reg=${DOCKER_REG:-"docker.io"}
+docker_reg=${DOCKER_REG:-"public.ecr.aws/ubuntu"}
 
 # Docker Image Build Variables:
 img_name=qemu-build
diff --git a/scripts/build-qemu-robot-docker.sh b/scripts/build-qemu-robot-docker.sh
index c8e402a..4517ffd 100755
--- a/scripts/build-qemu-robot-docker.sh
+++ b/scripts/build-qemu-robot-docker.sh
@@ -9,9 +9,8 @@
 #  PIP_MIRROR:       <optional, the URL of a PIP mirror>
 #                    default is empty, and no mirror is used.
 #  DOCKER_REG:       <optional, the URL of a docker registry to utilize
-#                    instead of the default docker hub
-#                    (ex. public.ecr.aws/ubuntu)
-#
+#                    instead of our default (public.ecr.aws/ubuntu)
+#                    (ex. docker.io)
 #  Parameters:
 #   parm1:  <optional, the name of the docker image to generate>
 #            default is openbmc/ubuntu-robot-qemu
@@ -25,7 +24,7 @@
 DISTRO=${2:-"ubuntu:jammy"}
 UBUNTU_MIRROR=${UBUNTU_MIRROR:-""}
 PIP_MIRROR=${PIP_MIRROR:-""}
-docker_reg=${DOCKER_REG:-"docker.io"}
+docker_reg=${DOCKER_REG:-"public.ecr.aws/ubuntu"}
 
 MIRROR=""
 if [[ -n "${UBUNTU_MIRROR}" ]]; then