diff --git a/do-build b/do-build
index 3ddc23f..ab02aff 100755
--- a/do-build
+++ b/do-build
@@ -547,8 +547,10 @@
   add_config_options "${uppercase_component}_${target_os}"
   add_config_options "${uppercase_component}_${target_arch}_${target_os}"
 
-  # Apply options that are specific to the host compiler
-  if [ ! -z "$HOST_TOOLS" ]
+  # Apply options that are specific to the host compiler, if we will
+  # be using it (if we're doing a cross-compilation then we are
+  # using a compiler that we built, and these options aren't relevant).
+  if [ "$HOST" == "$BUILD" ] && [ ! -z "$HOST_TOOLS" ]
   then
     add_config_options "${uppercase_component}_TOOLS_${HOST_TOOLS}"
   fi