diff --git a/python_appimage/__main__.py b/python_appimage/__main__.py
index 2f2f94e..84b023e 100644
--- a/python_appimage/__main__.py
+++ b/python_appimage/__main__.py
@@ -1,6 +1,5 @@
 import argparse
 from importlib import import_module
-import logging
 import os
 import sys
 
@@ -24,9 +23,9 @@ def main():
                                        dest='command')
 
     parser.add_argument('-q', '--quiet', help='disable logging',
-        dest='verbosity', action='store_const', const=logging.ERROR)
+        dest='verbosity', action='store_const', const='ERROR')
     parser.add_argument('-v', '--verbose', help='print extra information',
-        dest='verbosity', action='store_const', const=logging.DEBUG)
+        dest='verbosity', action='store_const', const='DEBUG')
 
     install_parser = subparsers.add_parser('install',
         description='Install binary dependencies')
@@ -89,7 +88,8 @@ def main():
 
     # Configure the verbosity
     if args.verbosity:
-        logging.getLogger().setLevel(args.verbosity)
+        from .utils import log
+        log.set_level(args.verbosity)
 
     # check if no arguments are passed
     if args.command is None:
diff --git a/python_appimage/commands/build/manylinux.py b/python_appimage/commands/build/manylinux.py
index 85745f8..bbd1e93 100644
--- a/python_appimage/commands/build/manylinux.py
+++ b/python_appimage/commands/build/manylinux.py
@@ -7,6 +7,7 @@ import sys
 from ...appimage import build_appimage, relocate_python
 from ...utils.docker import docker_run
 from ...utils.fs import copy_tree
+from ...utils.manylinux import format_appimage_name, format_tag
 from ...utils.tmp import TemporaryDirectory
 
 
@@ -19,15 +20,6 @@ def _unpack_args(args):
     return args.tag, args.abi, args.contained
 
 
-def _manylinux_tag(tag):
-    '''Format Manylinux tag
-    '''
-    if tag.startswith('2_'):
-        return 'manylinux_' + tag
-    else:
-        return 'manylinux' + tag
-
-
 def _get_appimage_name(abi, tag):
     '''Format the Python AppImage name using the ABI and OS tags
     '''
@@ -36,8 +28,7 @@ def _get_appimage_name(abi, tag):
     fullversion = desktop[13:-8]
 
     # Finish building the AppImage on the host. See below.
-    return 'python{:}-{:}-{:}.AppImage'.format(
-        fullversion, abi, _manylinux_tag(tag))
+    return format_appimage_name(abi, fullversion, tag)
 
 
 def execute(tag, abi, contained=False):
@@ -46,7 +37,7 @@ def execute(tag, abi, contained=False):
 
     if not contained:
         # Forward the build to a Docker image
-        image = 'quay.io/pypa/' + _manylinux_tag(tag)
+        image = 'quay.io/pypa/' + format_tag(tag)
         python = '/opt/python/' + abi + '/bin/python'
 
         pwd = os.getcwd()
@@ -54,7 +45,11 @@ def execute(tag, abi, contained=False):
         with TemporaryDirectory() as tmpdir:
             copy_tree(dirname, 'python_appimage')
 
-            argv = ' '.join(sys.argv[1:])
+            argv = sys.argv[1:]
+            if argv:
+                argv = ' '.join(argv)
+            else:
+                argv = 'build manylinux {:} {:}'.format(tag, abi)
             if tag.startswith("1_"):
                 # On manylinux1 tk is not installed
                 script = [
diff --git a/python_appimage/commands/list.py b/python_appimage/commands/list.py
index e3bb3ab..083a4d2 100644
--- a/python_appimage/commands/list.py
+++ b/python_appimage/commands/list.py
@@ -35,7 +35,9 @@ def execute(tag):
             script,
             capture = True
         )
-        for line in result.split(os.linesep):
-            if line:
-                log('LIST', "{1:7} ->  /opt/python/{0:}".format(
-                    *line.split()))
+        pythons = [line.split() for line in result.split(os.linesep) if line]
+
+        for (abi, version) in pythons:
+            log('LIST', "{:7} ->  /opt/python/{:}".format(version, abi))
+
+        return pythons
diff --git a/python_appimage/utils/log.py b/python_appimage/utils/log.py
index 1151791..e5a1e37 100644
--- a/python_appimage/utils/log.py
+++ b/python_appimage/utils/log.py
@@ -7,17 +7,25 @@ __all__ = ['debug', 'log']
 # Configure the logger
 logging.basicConfig(
     format='[%(asctime)s] %(message)s',
-    level=logging.INFO
+    level=logging.ERROR
 )
+logging.getLogger('python-appimage').setLevel(logging.INFO)
 
 
 def log(task, fmt, *args):
     '''Log a standard message
     '''
-    logging.info('%-8s ' + fmt, task, *args)
+    logging.getLogger('python-appimage').info('%-8s ' + fmt, task, *args)
 
 
 def debug(task, fmt, *args):
     '''Report some debug information
     '''
-    logging.debug('%-8s ' + fmt, task, *args)
+    logging.getLogger('python-appimage').debug('%-8s ' + fmt, task, *args)
+
+
+def set_level(level):
+    '''Set the threshold for logs
+    '''
+    level = getattr(logging, level)
+    logging.getLogger('python-appimage').setLevel(level)