- python 2.7
- Cython (note: even if using the stack-supplied Anaconda distribution, you should run conda install cython to install the Sims stack)
- git-lfs is required for installation from source (eups or lsstsw) – read-only mode is sufficient for installing the sims packages
- See http://developer.lsst.io/en/latest/tools/git_lfs.html for instructions in installing and setting up git-lfs for LSST
The recommended install instructions will provide these dependencies for you through an Anaconda distribution.