setup.py breaks builds
Hello,
debian builder is broken after latest edits of the setup.py
https://github.com/pydata/pandas/commits/master/setup.py

error

```
raceback (most recent call last):
  File "setup.py", line 213, in <module>
    if pipe.returncode != 0:
NameError: name 'pipe' is not defined
dh_auto_clean: python setup.py clean -a returned exit code 1
```
