diff --git a/build/root/install.sh b/build/root/install.sh
index 62a1cd4..5e96e2b 100644
--- a/build/root/install.sh
+++ b/build/root/install.sh
@@ -15,6 +15,22 @@ unzip /tmp/scripts-master.zip -d /tmp
 # move shell scripts to /root
 mv /tmp/scripts-master/shell/arch/docker/*.sh /usr/local/bin/
 
+# detect image arch
+####
+
+OS_ARCH=$(cat /etc/os-release | grep -P -o -m 1 "(?=^ID\=).*" | grep -P -o -m 1 "[a-z]+$")
+if [[ ! -z "${OS_ARCH}" ]]; then
+	if [[ "${OS_ARCH}" == "arch" ]]; then
+		OS_ARCH="x86-64"
+	else
+		OS_ARCH="aarch64"
+	fi
+	echo "[info] OS_ARCH defined as '${OS_ARCH}'"
+else
+	echo "[warn] Unable to identify OS_ARCH, defaulting to 'x86-64'"
+	OS_ARCH="x86-64"
+fi
+
 # pacman packages
 ####