--- a/openssl.SlackBuild	2021-02-10 09:12:38.901159895 +0200
+++ b/openssl.SlackBuild	2021-02-10 09:13:03.553143710 +0200
@@ -83,6 +83,10 @@
   LIBDIRSUFFIX=""
 elif [ "$ARCH" = "x86_64" ]; then
   LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "aarch64" ]; then
+  LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "riscv64" ]; then
+  LIBDIRSUFFIX="64"
 fi
 
 # OpenSSL has a (nasty?) habit of bumping the internal version number with
@@ -138,6 +142,9 @@
  no-sse2 \
  shared
 
+sed -i "s/^LIBDIR=lib$/LIBDIR=lib${LIBDIRSUFFIX}/" Makefile
+sed -i "s/lib\/engines/lib${LIBDIRSUFFIX}\/engines/" Makefile
+
 make $NUMJOBS depend || make depend || exit 1
 
 make $NUMJOBS || make || exit 1