diff --git a/cli_function.py b/cli_function.py
index 54170c2..fe126c8 100755
--- a/cli_function.py
+++ b/cli_function.py
@@ -130,10 +130,11 @@ class CliFunction:
     def _do_main(self, kwargs):
         return self.main(**self._get_args(kwargs))
 
-    def __init__(self, config_file=None, description=None):
+    def __init__(self, config_file=None, description=None, extra_config_params=None):
         self._arguments = collections.OrderedDict()
         self._config_file = config_file
         self._description = description
+        self.extra_config_params = extra_config_params
         if self._config_file is not None:
             self.add_argument(
                 '--config-file',
@@ -155,7 +156,10 @@ class CliFunction:
         if config_file is not None and os.path.exists(config_file):
             config_configs = {}
             config = imp.load_source('config', config_file)
-            config.set_args(config_configs)
+            if self.extra_config_params is None:
+                config.set_args(config_configs)
+            else:
+                config.set_args(config_configs, self.extra_config_params)
             for key in config_configs:
                 if key not in self._arguments:
                     raise Exception('Unknown key in config file: ' + key)
diff --git a/common.py b/common.py
index a604e7a..e1aba97 100644
--- a/common.py
+++ b/common.py
@@ -108,6 +108,7 @@ class LkmcCliFunction(cli_function.CliFunction):
         :param defaults: override the default value of an argument
         '''
         kwargs['config_file'] = consts['config_file']
+        kwargs['extra_config_params'] = os.path.basename(inspect.getfile(self.__class__))
         if defaults is None:
             defaults = {}
         self._defaults = defaults
@@ -294,7 +295,7 @@ Use gem5 instead of QEMU. Shortcut for `--emulator gem5`.
         '''
         For Python code calls, print the CLI equivalent of the call.
         '''
-        print_cmd = ['./' + inspect.getfile(self.__class__), LF]
+        print_cmd = ['./' + self.extra_config_params, LF]
         for line in self.get_cli(**kwargs):
             print_cmd.extend(line)
             print_cmd.append(LF)
diff --git a/config.py b/config.py
index 959932b..b7ad4ad 100644
--- a/config.py
+++ b/config.py
@@ -1,3 +1,6 @@
-def set_args(args):
+def set_args(args, script_name):
     args['arch'] = 'aarch64'
     args['gem5'] = True
+    if script_name == 'build-gem5':
+        # This argument is defined only for ./build-gem5.
+        args['extra_scons_args'] = ['ADSF=qwer']