diff --git a/tools/osbuilder/rootfs-builder/rootfs.sh b/tools/osbuilder/rootfs-builder/rootfs.sh
index e377e25f7e..0a840b1315 100755
--- a/tools/osbuilder/rootfs-builder/rootfs.sh
+++ b/tools/osbuilder/rootfs-builder/rootfs.sh
@@ -43,6 +43,16 @@ if [[ "${AGENT_POLICY}" == "yes" ]]; then
 	agent_policy_file="$(readlink -f -v "${AGENT_POLICY_FILE:-"${script_dir}/../../../src/kata-opa/allow-all.rego"}")"
 fi
 
+INSIDE_CONTAINER=${INSIDE_CONTAINER:-""}
+IMAGE_REGISTRY=${IMAGE_REGISTRY:-""}
+http_proxy=${http_proxy:-""}
+https_proxy=${https_proxy:-""}
+AGENT_POLICY_FILE=${AGENT_POLICY_FILE:-""}
+GRACEFUL_EXIT=${GRACEFUL_EXIT:-""}
+USE_DOCKER=${USE_DOCKER:-""}
+USE_PODMAN=${USE_PODMAN:-""}
+EXTRA_PKGS=${EXTRA_PKGS:-""}
+
 NVIDIA_GPU_STACK=${NVIDIA_GPU_STACK:-""}
 nvidia_rootfs="${script_dir}/nvidia/nvidia_rootfs.sh"
 source "$nvidia_rootfs"