--- a/gkrellm.SlackBuild	2021-02-13 00:42:10.532236179 +0200
+++ b/gkrellm.SlackBuild	2021-02-13 00:43:01.992183675 +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