Index: lldb/packages/Python/lldbsuite/test/builders/builder.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/builders/builder.py
+++ lldb/packages/Python/lldbsuite/test/builders/builder.py
@@ -93,11 +93,7 @@
         Helper function to return the key-value string to specify the architecture
         used for the make system.
         """
-        arch = architecture if architecture else None
-        if not arch and configuration.arch:
-            arch = configuration.arch
-
-        return ("ARCH=" + arch) if arch else ""
+        return ("ARCH=" + architecture) if architecture else ""
 
     def getCCSpec(self, compiler):
         """
Index: lldb/packages/Python/lldbsuite/test/lldbtest.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -2606,6 +2606,9 @@
         """Platform specific way to build the default binaries."""
         module = builder_module()
 
+        if not architecture and configuration.arch:
+            architecture = configuration.arch
+
         dictionary = lldbplatformutil.finalize_build_dictionary(dictionary)
         if self.getDebugInfo() is None:
             return self.buildDefault(architecture, compiler, dictionary)