--- a/attr.SlackBuild	2021-02-10 16:47:58.303197207 +0200
+++ b/attr.SlackBuild	2021-02-10 16:48:31.835173803 +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