diff --git a/examples/waveflow/synthesis.py b/examples/waveflow/synthesis.py
index 3ec0da7..1e3fb9e 100644
--- a/examples/waveflow/synthesis.py
+++ b/examples/waveflow/synthesis.py
@@ -2,13 +2,13 @@ import os
 import random
 from pprint import pprint
 
-import jsonargparse
+import argparse
 import numpy as np
 import paddle.fluid.dygraph as dg
 from paddle import fluid
 
 import utils
-from waveflow import WaveFlow
+from parakeet.models.waveflow import WaveFlow
 
 
 def add_options_to_parser(parser):
@@ -53,7 +53,7 @@ def add_options_to_parser(parser):
 
 
 def synthesize(config):
-    pprint(jsonargparse.namespace_to_dict(config))
+    pprint(vars(config))
 
     # Get checkpoint directory path.
     run_dir = os.path.join("runs", config.model, config.name)
@@ -90,9 +90,8 @@ def synthesize(config):
 
 if __name__ == "__main__":
     # Create parser.
-    parser = jsonargparse.ArgumentParser(
-        description="Synthesize audio using WaveNet model",
-        formatter_class='default_argparse')
+    parser = argparse.ArgumentParser(
+        description="Synthesize audio using WaveNet model")
     add_options_to_parser(parser)
     utils.add_config_options_to_parser(parser)
 
@@ -100,4 +99,5 @@ if __name__ == "__main__":
     # For conflicting updates to the same field,
     # the preceding update will be overwritten by the following one.
     config = parser.parse_args()
+    config = utils.add_yaml_config(config)
     synthesize(config)
diff --git a/examples/waveflow/utils.py b/examples/waveflow/utils.py
index e8ed372..c088b1d 100644
--- a/examples/waveflow/utils.py
+++ b/examples/waveflow/utils.py
@@ -84,7 +84,6 @@ def add_config_options_to_parser(parser):
 
 
 def add_yaml_config(config):
-    print(config)
     with open(config.config, 'rt') as f:
         yaml_cfg = ruamel.yaml.safe_load(f)
     cfg_vars = vars(config)
diff --git a/parakeet/models/waveflow/waveflow.py b/parakeet/models/waveflow/waveflow.py
index 351b287..569086e 100644
--- a/parakeet/models/waveflow/waveflow.py
+++ b/parakeet/models/waveflow/waveflow.py
@@ -152,7 +152,8 @@ class WaveFlow():
         sample = config.sample
 
         output = "{}/{}/iter-{}".format(config.output, config.name, iteration)
-        os.makedirs(output, exist_ok=True)
+        if not os.path.exists(output):
+            os.makedirs(output)
 
         mels_list = [mels for _, mels in self.validloader()]
         if sample is not None: