diff --git a/tools/Makefile b/tools/Makefile
index 9ba4608ecad..ff6e55d7299 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -21,7 +21,8 @@ endif
 
 # Build LLD and LLDB if present. Note LLDB must be built last as it depends on
 # the wider LLVM infrastructure (including Clang).
-OPTIONAL_DIRS := lld lldb
+OPTIONAL_PARALLEL_DIRS += lld
+OPTIONAL_DIRS := lldb
 
 # NOTE: The tools are organized into five groups of four consisting of one
 # large and three small executables. This is done to minimize memory load