diff --git a/scripts/pkg_versions.py b/scripts/pkg_versions.py
index 66a46aa..ae76833 100644
--- a/scripts/pkg_versions.py
+++ b/scripts/pkg_versions.py
@@ -7,7 +7,8 @@
 def shell(command):
     _ps = subprocess.Popen(
         command.split(),
-        stdout=subprocess.PIPE
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE
     ).communicate()[0].decode()
 
     return _ps
@@ -50,4 +51,7 @@
     pkgs[_pkg]['raw'] = res[3]
 
 buff = json.dumps(pkgs)
-sys.stdout.write(buff)
+if len(sys.argv) > 1 and sys.argv[1] == 'stdout':
+    sys.stdout.write(buff)
+else:
+    print(buff)