LALPulsar Koji build fails reading earth00-40-DE405.dat.gz

I'm working on adding nightly builds using the Koji infrastructure so that we can test using exactly the same process that builds the release RPMs. The build is currently failing with:

XLAL Error - XLALReadEphemerisFile (LALInitBarycenter.c:482): Failed to find ephemeris-file 'earth00-40-DE405.dat.gz[.gz]'
XLAL Error - XLALReadEphemerisFile (LALInitBarycenter.c:482): Invalid argument
XLAL Error - XLALInitBarycenter (LALInitBarycenter.c:252): XLALReadEphemerisFile('earth00-40-DE405.dat.gz') failed
XLAL Error - XLALInitBarycenter (LALInitBarycenter.c:252): Internal function call failed: Invalid argument

Full build log is here.