python-module-timelib-0.2.4-alt2 needs to be built with Cython, since it supports Cython. Preferrably from the same source on all platforms. See also https://lists.altlinux.org/pipermail/devel/2018-March/204117.html
python3-module-timelib-0.2.4-alt4 -> sisyphus: Fri Jun 08 2018 Grigory Ustinov <grenka@altlinux> 0.2.4-alt4 - Build with Cython (Closes: #34719).