specify python version

install.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 git clone https://github.com/lnyemba/jx src/api/static/js/jx
-virtualenv sandbox
+virtualenv sandbox --python=python2.7
 source sandbox/bin/activate
 pip install -r requirements.txt
 export PYTHONPATH=$PWD/src