Installation fail under pip 1.4+

[selimnairb]

If you get an error message similar to:

Downloading/unpacking pytz (from OWSLib)
Could not find a version that satisfies the requirement pytz (from OWSLib) (from versions: 2007i, 2009j, 2011e, 2009u, 2009r, 2009i, 2005m, 2010h, 2013b, 2011c, 2010k, 2012b, 2009g, 2010g, 2012g, 2012f, 2009f, 2010b, 2009d, 2006g, 2009e, 2011j, 2009i, 2010e, 2007d, 2008c, 2008h, 2008i, 2011n, 2005m, 2011e, 2010l, 2009p, 2008h, 2010b, 2009u, 2008c, 2006j, 2009f, 2005m, 2009g, 2010g, 2010h, 2007c, 2009i, 2007k, 2008g, 2009j, 2007i, 2008i, 2006p, 2009p, 2010k, 2007f, 2008i, 2008g, 2007d, 2010l, 2007k, 2007g, 2009g, 2007c, 2009n, 2009e, 2008a, 2006g, 2009a, 2010l, 2007k, 2007c, 2009r, 2009p, 2006j, 2011j, 2006g, 2009n, 2009u, 2005k, 2007i, 2011b, 2013b, 2005k, 2006p, 2010b, 2005r, 2006j, 2009n, 2009l, 2008h, 2009d, 2008b, 2010o, 2008b, 2011k, 2009a, 2009r, 2010k, 2007f, 2008a, 2008a, 2008b, 2009e, 2007d, 2011g, 2005r, 2012c, 2011c, 2012g, 2011n, 2011g, 2010h, 2011k, 2012d, 2009f, 2010g, 2011e, 2012c, 2008c, 2007g, 2012c, 2009l, 2011n, 2012g, 2012j, 2009a, 2009l, 2011h, 2012f, 2010e, 2011g, 2012j, 2011d, 2010e, 2011c, 2012j, 2005k, 2011d, 2007g, 2012f, 2011j, 2012b, 2013d, 2009d, 2005r, 2010o, 2013b, 2011k, 2006p, 2013d, 2012d, 2012h, 2011h, 2012d, 2011h, 2008g, 2009j, 2007f, 2012b, 2011d, 2012h, 2013d, 2010o, 2004b)
Cleaning up...
No distributions matching the version for pytz (from OWSLib)
Storing complete log in /Users/miles/.pip/pip.log

Try installing using the "--pre" option:

sudo pip install --pre rhessysworkflows

The roof problem is caused by a package that rhessysworkflows depends on, and is described here: selimnairb/EcohydroLib#4

With luck the broken package will be fixed, requiring no changes to rhessysworkflows/ecohydrolib.

[selimnairb]

This has been fixed in the latest release of pytz.