In an effort to better encode version strings and use descriptive pnames
that do not conflict with top level pkgs, we currently use
wordpress-${type}-${pname} for pname. This is good for the nix store,
but when we synthesize the wordpress derivation in our module, we reuse
this pname for the output directory.
Internally wordpress can handle this fine, since plugins must register
via php, not directory. Unfortunately, many plugins like civicrm and
wpforms-lite are designed to rely upon the name of their install
directory for homing or discovery.
As such, we should follow both the upstream convention and
services.nextcloud.extraApps and use an attribute set for these options.
This allows us to not have to deal with the implementation details of
plugins and themes, which differ from official and third party, but also
give users the option to override the install location. The only issue
is that it breaks the current api.
66e0e5ad74