setup.py does not execute successfully more than once

[uvsmtid]

Version

This issue reports based on commit f27c71cacc commit using Fedora 19 x86_64.

Reproducing

Checkout latest salt-thin commit:

git clone https://github.com/saltstack/salt-thin

The following command will download all the components and execute successfully showing help output:

python setup.py --help-commands
...

Executing the same command subsequently fails:

python setup.py --help
...
Traceback (most recent call last):
File "setup.py", line 104, in <module>
build_setup('git')
File "setup.py", line 67, in build_setup
shutil.copytree(full, os.path.join(CWD, sub))
File "/usr/lib/python2.7/shutil.py", line 175, in copytree
os.makedirs(dst)
File "/usr/lib/python2.7/os.py", line 157, in makedirs
mkdir(name, mode)
OSError: [Errno 17] File exists: '/home/user/salt-thin/jinja2'