import sys
import os
from os.path import join
-from subprocess import run, PIPE
+from subprocess import run, PIPE, STDOUT
from distutils.version import StrictVersion
(sphinx, src, dst) = sys.argv[1:] # assign parameters to variables
# for sphinx version >= 1.7 add parallelism using "-j auto"
-ver = run([sphinx, '--version'], stdout=PIPE).stdout.decode().split()[-1]
+ver = run([sphinx, '--version'], stdout=PIPE,
+ stderr=STDOUT).stdout.decode().split()[-1]
sphinx_cmd = [sphinx]
if StrictVersion(ver) >= StrictVersion('1.7'):
sphinx_cmd += ['-j', 'auto']