diff --git a/functions.sh b/functions.sh
index 4a6f5ce..dcf849a 100644
--- a/functions.sh
+++ b/functions.sh
@@ -263,7 +263,7 @@ get_podman_volume_path () {
 # Execute elf binary from stdin
 elfexec () {
     opts=$(echo "$@")
-    if [[ $(uname -i) == 'aarch64' ]]; then
+    if [[ "${HOSTTYPE}" == 'aarch64' ]]; then
 	memfd_create='279'
     else
 	# defaults to amd64