On this regard, Guix is better than Nix imo : you can rewrite expressions quite easily in a programmatic manner thanks to Guile, which is also used for package

On this regard, Guix is better than Nix imo : you can rewrite expressions quite easily in a programmatic manner thanks to Guile, which is also used for package definitions ( https://guix.gnu.org/manual/en/html_node/Defining-Package-Variants.html https://guix.gnu.org/manual/en/html_node/Defining-Package-Va... or https://guix.gnu.org/manual/en/html_node/Package-Transformation-Options.html https://guix.gnu.org/manual/en/html_node/Package-Transformat... )