This would create different service type objects.
* modules/rosenthal/services/shellutils.scm (%home-atuin-fish)
(home-atuin-service-type, %home-direnv-fish, home-direnv-service-type)
(%home-zoxide-fish, home-zoxide-service-type): Avoid dynamically extensions.
* modules/rosenthal/services/shellutils.scm (home-atuin-service-type)
(home-direnv-service-type, home-zoxide-service-type): New variables.
(<home-atuin-configuration>, <home-direnv-configuration>)
(<home-zoxide-configuration>): New data types.
* .dir-locals.el (scheme-mode): Add indentations for their constructors.