+NSB_DIR="/opt/nsb_bin"
+
+if [[ "${DOCKER_ARCH}" == "aarch64" ]]; then
+ sed -i -e 's/^deb \([^/[]\)/deb [arch=arm64] \1/g' "${source_file}"
+ DOCKER_ARCH="arm64"
+ DOCKER_REPO="${UBUNTU_PORTS_URL}"
+ EXTRA_ARCH="amd64"
+ EXTRA_REPO="${UBUNTU_ARCHIVE_URL}"
+ dpkg --add-architecture amd64
+else
+ sed -i -e 's/^deb \([^/[]\)/deb [arch=amd64] \1/g' "${source_file}"
+ DOCKER_ARCH="amd64"
+ DOCKER_REPO="${UBUNTU_ARCHIVE_URL}"
+ EXTRA_ARCH="arm64"
+ EXTRA_REPO="${UBUNTU_PORTS_URL}"
+ dpkg --add-architecture arm64
+fi
+