<tool_dependency>
    <package name="dendropy" version="3.12.0">
        <install version="1.0">
            <actions>
                <action type="download_by_url">http://pypi.python.org/packages/source/D/DendroPy/DendroPy-3.12.0.tar.gz</action>
                <action type="make_directory">$INSTALL_DIR/lib/python</action>
                <action type="shell_command">export PYTHONPATH=$PYTHONPATH:$INSTALL_DIR/lib/python &amp;&amp; python setup.py install --home $INSTALL_DIR --install-scripts $INSTALL_DIR/bin</action>
                <action type="set_environment">
                    <environment_variable name="PYTHONPATH" action="prepend_to">$INSTALL_DIR/lib/python</environment_variable>
                    <environment_variable name="PATH" action="prepend_to">$INSTALL_DIR/bin</environment_variable>
                </action>
            </actions>
        </install>
        <readme>DendroPy is a Python library for phylogenetic computing.
                DendroPy is a pure-Python library with no dependencies, and runs under any version of Python 2 from 2.4 upwards
                (i.e., Python 2.4, 2.5, 2.6, 2.7, etc.). At present, it does not run under Python 3.</readme>
    </package>
</tool_dependency>