There is a new version of lsst_sims available via eups distrib install. This version is python 3 compliant. To install it, run either
eups distrib install lsst_sims -t sims
or
eups distrib install lsst_sims -t sims_2_3_4
The DM part of this stack is built against version 13.0. lsst_sims is not yet compatible with pybind11, which DM recently adopted as their tool for wrapping C++ into python (they formerly to use SWIG). The next version of lsst_sims ought to be pybind11 compatible, as well.
Note: this stack will not work if you have an astropy version > 1.2. Hopefully the next version of lsst_sims will be compatible with astropy 1.3.
Note: you can also now run eups distrib install sims_operations -t sims and get sims_operations version 3.3.8 (the last release) built against lsst_sims 2.3.4.
As always, eups distrib install lsst_apps -t sims will get you an lsst_apps install that is consistent (DM v 13) with lsst_sims.