diff --git a/qemu-build.sh b/qemu-build.sh
index 3e5f422..54044e7 100755
--- a/qemu-build.sh
+++ b/qemu-build.sh
@@ -21,6 +21,9 @@
 #                     Default: "", proxy is not setup if this is not set
 #  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)
 #
 ###############################################################################
 # Trace bash processing
@@ -34,6 +37,8 @@
     exit 1
 fi
 
+docker_reg=${DOCKER_REG:-"docker.io"}
+
 # Docker Image Build Variables:
 img_name=qemu-build
 
@@ -89,7 +94,7 @@
 # !!!
 
 Dockerfile=$(cat << EOF
-FROM ubuntu:jammy
+FROM ${docker_reg}/ubuntu:jammy
 
 ${PROXY}