--- a/bzip2.SlackBuild	2021-02-10 16:49:21.211139300 +0200
+++ b/bzip2.SlackBuild	2021-02-10 16:49:51.555118073 +0200
@@ -50,6 +50,10 @@
 
 if [ "$ARCH" = "x86_64" ]; then
   LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "aarch64" ]; then
+  LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "riscv64" ]; then
+  LIBDIRSUFFIX="64"
 else
   LIBDIRSUFFIX=""
 fi