As nixpkgs expands its list of supported platforms, new system tuples are added. Therefore we need to adjust the test suite regularly in order to cover newly added platforms. For this purpose, the test suite checks the platforms it verifies against a list of system tuples generated from nixpkgs. This list needs to be updated manually, so running the test suite doesn't depend on Nix being available.

To check if any new platforms need to be covered, do the following:

1. Run ./test/data/regenerate-all-system-tuples.sh /path/to/nixpkgs/checkout. If no local nixpkgs is given, <nixpkgs> will be used.

2. Run the test suite: cabal v2-test.

3. If the test suite fails, add test cases for all missing system tuples.

4. In all cases, change the dates of last update in test/hspec.hs and src/Distribution/Nixpkgs/Meta.hs to the current day.