[Debian-astro-maintainers] Bug#877481: casacore-data-tai-utc: trigger problem during upgrade from stretch to buster

[Ole Streicher]

Control: reassign -1 python3-astropy 2.1.2-4
Control: affects -1 casacore-data-tai-utc

The problem is a missing dependency of python3-astropy from
python3-numpy-abi${ABI}, which needs to be calculated and included in
${python3:Depends}.