constraints.txt

# Scipy 1.11 seems to have caused an instability in the Weyl coordinates
# eigensystem code for one of the test cases.  See
# https://github.com/Qiskit/qiskit-terra/issues/10345 for current details.
scipy<1.11; python_version<'3.12'

# z3-solver from 4.12.3 onwards upped the minimum macOS API version for its
# wheels to 11.7. The Azure VM images contain pre-built CPythons, of which at
# least CPython 3.8 was compiled for an older macOS, so does not match a
# `macos_11_7` platform tag.  This should be purely a CI artefact, and not
# affect local usage.
z3-solver==4.12.2.0; platform_system=="Darwin"

# There are minor differences in output between pydot 2, 3 and 4 for
# things like the pass-manager drawer.  This is totally fine for general
# usage, but our test suite uses an exact reference file that uses the
# pydot 4 output, so we need to enforce that during tests.
pydot>=4.0.0

# Our Sphinx version is not compatible with snowballstemmer>=3.0.0 (and
# neither is latest Sphinx at this time). See https://github.com/sphinx-doc/sphinx/issues/13533.
snowballstemmer<3.0.0