diff --git a/config/optimize b/config/optimize
index d81eefea87..ca39331a61 100644
--- a/config/optimize
+++ b/config/optimize
@@ -67,12 +67,14 @@ if [ -z "$HOST_LIBDIR" ]; then
   # ubuntu/debian specific "multiarch support"
   export MACHINE_HARDWARE_NAME="$(uname -m)"
   export MACHINE_HARDWARE_PLATFORM="$(uname -i)"
-  FAMILY_TRIPLET=${HOST_NAME/${MACHINE_HARDWARE_NAME}/${MACHINE_HARDWARE_PLATFORM}}
-  if [ -d /lib/$FAMILY_TRIPLET ]; then
-    HOST_LIBDIR="$HOST_LIBDIR /lib/$FAMILY_TRIPLET"
-  fi
-  if [ -d /usr/lib/$FAMILY_TRIPLET ]; then
-    HOST_LIBDIR="$HOST_LIBDIR /usr/lib/$FAMILY_TRIPLET"
+  FAMILY_TRIPLET=$($LOCAL_CC -print-multiarch)
+  if [ -n "$FAMILY_TRIPLET" ]; then
+    if [ -d /lib/$FAMILY_TRIPLET ]; then
+      HOST_LIBDIR="$HOST_LIBDIR /lib/$FAMILY_TRIPLET"
+    fi
+    if [ -d /usr/lib/$FAMILY_TRIPLET ]; then
+      HOST_LIBDIR="$HOST_LIBDIR /usr/lib/$FAMILY_TRIPLET"
+    fi
   fi
 
   # default multiarch support