PATH env var missing in followup jobs launched via condor

The overflows plugin fails due to PATH not being in the environment:

2018-10-18 13:07:59,199 plotting WIDE ADC overflows for ASC subsystem
Traceback (most recent call last):
  File "/home/lockloss/src/locklost/locklost/analyze.py", line 29, in analyze_event
    func(event)
  File "/home/lockloss/src/locklost/locklost/plugins/overflows.py", line 70, in find_overflows
    figsize=[12, 16],
  File "/usr/lib/python2.7/site-packages/gwpy/segments/flag.py", line 1738, in plot
    from ..plotter import SegmentPlot
  File "/usr/lib/python2.7/site-packages/gwpy/plotter/__init__.py", line 29, in <module>
    from .rc import DEFAULT_PARAMS as GWPY_PLOT_PARAMS
  File "/usr/lib/python2.7/site-packages/gwpy/plotter/rc.py", line 27, in <module>
    from . import tex
  File "/usr/lib/python2.7/site-packages/gwpy/plotter/tex.py", line 56, in <module>
    HAS_TEX = has_tex()
  File "/usr/lib/python2.7/site-packages/gwpy/plotter/tex.py", line 50, in has_tex
    which(exe)
  File "/usr/lib/python2.7/site-packages/gwpy/utils/shell.py", line 56, in which
    for path in os.environ["PATH"].split(os.pathsep):
  File "/usr/lib64/python2.7/UserDict.py", line 23, in __getitem__
    raise KeyError(key)
KeyError: 'PATH'
2018-10-18 13:08:01,074 INCOMPLETE ANALYSIS

It is suspected that it could be from our condor_submit job because getenv is set to False. Hopefully it's as simple as that.