Created attachment 1221930 [details]
spec

Description of problem:

With the system erfa 1.3.0, test_sidereal fails:

_____________ ERROR collecting astropy/time/tests/test_sidereal.py _____________
astropy/time/tests/test_sidereal.py:24: in <module>
    class TestERFATestCases():
astropy/time/tests/test_sidereal.py:34: in TestERFATestCases
    assert np.allclose(time_ut1.tt.jd2 - time_tt.jd2, 0., atol=1.e-14)
E   assert False
E    +  where False = <function allclose at 0xf4fce80c>((-0.4999999999999999 - 0.5), 0.0, atol=1e-14)
E    +    where <function allclose at 0xf4fce80c> = np.allclose
E    +    and   -0.4999999999999999 = <Time object: scale='tt' format='jd' value=2453735.5>.jd2
E    +      where <Time object: scale='tt' format='jd' value=2453735.5> = <Time object: scale='ut1' format='jd' value=2453736.5>.tt
E    +    and   0.5 = <Time object: scale='tt' format='jd' value=2453736.5>.jd2

See https://github.com/astropy/astropy/pull/5466 for more details.

I'm proposing we build with the bundled erfa for now until this is resolved.

I'd also like to build with the bundled wcslib on EPEL.  See attached spec for details.  Although we do have an issue with an old scipy in EPEL at the moment.

Version-Release number of selected component (if applicable):
1.2.1-4.fc26