--- a/python/mach/mach/mixin/process.py
+++ b/python/mach/mach/mixin/process.py
@@ -131,17 +131,22 @@ class ProcessExecutionMixin(LoggingMixin
                     pass
         else:
             p = ProcessHandlerMixin(args, cwd=cwd, env=use_env,
                                     processOutputLine=[handleLine],
                                     universal_newlines=True,
                                     ignore_children=ignore_children)
             p.run()
             p.processOutput()
-            status = p.wait()
+            status = None
+            while status is None:
+                try:
+                    status = p.wait()
+                except KeyboardInterrupt:
+                    status = p.kill()
 
         if ensure_exit_code is False:
             return status
 
         if ensure_exit_code is True:
             ensure_exit_code = 0
 
         if status != ensure_exit_code: