SymPy 'prec=XX' decimal precision deprecated

[pdeperio]

Observed during the AddGains task:

/project/lgrandi/anaconda3/envs/pax_v6.8.0/lib/python3.4/site-packages/sympy-1.1.1-py3.4.egg/sympy/core/numbers.py:948: SymPyDeprecationWarning:

Using 'prec=XX' to denote decimal precision has been deprecated since
SymPy 1.1. Use 'dps=XX' for decimal precision and 'precision=XX' for
binary precision instead. See
https://github.com/sympy/sympy/issues/12820 for more info.

  deprecated_since_version="1.1").warn()

Since (for some reason) sympy was updated to 1.1.1 in the pax_v6.8.0 environment, from 1.0 in e.g. pax_v6.6.6 environment.