--- a/acl.SlackBuild	2021-01-20 20:13:07.131005819 +0200
+++ b/acl.SlackBuild	2021-02-10 18:02:56.868211711 +0200
@@ -49,6 +49,10 @@
 
 if [ "$ARCH" = "x86_64" ]; then
   LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "aarch64" ]; then
+  LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "riscv64" ]; then
+  LIBDIRSUFFIX="64"
 else
   LIBDIRSUFFIX=""
 fi