I would like to test  my stack installation,  I have tried to run the lsst_dm_stack_demo-11.0.
After
setup obs_sdss
```
bin/demo.sh gives:
```
Setting up: astrometry_net_data             Flavor: DarwinX86  Version: 
LOCAL:/Users/dadoun/LSST/lsst/lsst_dm_stack_demo-11.0/astrometry_net_data
Could not import lsstcppimport; please ensure the base package has been built 
(not just setup).
Traceback (most recent call last):
...
Referenced from: /Users/dadoun/LSST/lsst/DarwinX86/pex_policy/
2015_10.0-1-gd4eb80a+2/python/lsst/pex/policy/_policyLib.so
  Reason: image not found
```
Any idea ?
 (see
 (see 