On NixOS, exporting a brush group by pressing “Export as Zipped Brushset” action in its properties fails with:
ValueError: ZIP does not support timestamps before 1980
The gui.brushmanager.BrushManager.export_group doctest fails with the same error.
This is because Nix forces mtime of package files to 0 (1970-01-01) to ensure the build outputs are consistently reproducible.
Let’s disable strict timestamps to clamp the out-of-range timestamps to ZIP epoch. That argument was actually introduced in Python 3.8 because of reproducible builds: https://bugs.python.org/issue34097
On NixOS, exporting a brush group by pressing “Export as Zipped Brushset” action in its properties fails with:
The
gui.brushmanager.BrushManager.export_groupdoctest fails with the same error.This is because Nix forces
mtimeof package files to 0 (1970-01-01) to ensure the build outputs are consistently reproducible.Let’s disable strict timestamps to clamp the out-of-range timestamps to ZIP epoch. That argument was actually introduced in Python 3.8 because of reproducible builds: https://bugs.python.org/issue34097
This raises minimum version of Python to 3.8.