This involves a lot more than just sympy: the (build-)dependency chain is
execnet - sometimes FTBFS (3-4x unreproducible test failures, no known
fix; disabling/ignoring the tests in question would probably make it
build, but obviously isn't a real fix)
^
|
pytest-xdist
^
|(apparently only for already-disabled tests)
|
wand <-- sorl-thumbnail willow
^
|
blockdiag - FTBFS (test mistakes annoying-but-harmless wand warning for
an error) with patch
^
|(some indirectly)
|
actdiag brian cain chaussette dolfin fenics ffc fiat geophar ironic nipy
nipype nova nwdiag octave-symbolic openstack-meta-packages
python-measurement python-ws4py rabbit rabbiter sagemath seelablet
seqdiag sfepy sphinxcontrib-actdiag sphinxcontrib-blockdiag
sphinxcontrib-nwdiag sphinxcontrib-seqdiag sympy yt
Hence, we can save a lot more packages than just sympy by applying the
blockdiag patch and either cutting wand->pytest-xdist or disabling
execnet's problematic tests.
