You can edit the modules and then run it to see what the config output will be:
nix run
{"deps":["ruby","bundler"],"rails":{"db":"mariadb"}}
A toy NixOS modules example for playing with the module system directly.
Nix
You can edit the modules and then run it to see what the config output will be:
nix run
{"deps":["ruby","bundler"],"rails":{"db":"mariadb"}}