Module broken on non-Linux operating system

[smortex]

root@agrajag /usr/home/romain # facter os
{
  architecture => "amd64",
  family => "FreeBSD",
  hardware => "amd64",
  name => "FreeBSD",
  release => {
    branch => "RC4",
    full => "14.0-RC4",
    major => "14",
    minor => "0"
  }
}
root@agrajag /usr/home/romain # puppet agent -t -E romain --tags Postgresql
[...]
Notice: /Stage[main]/Postgresql::Server::Service/Postgresql::Server::Instance::Service[main]/Anchor[postgresql::server::service::begin::main]: Dependency Postgresql_conf[port_for_instance_main] has failures: true
Notice: /Stage[main]/Postgresql::Server::Service/Postgresql::Server::Instance::Service[main]/Anchor[postgresql::server::service::begin::main]: Dependency Postgresql_conf[password_encryption_for_instance_main] has failures: true
Notice: /Stage[main]/Postgresql::Server::Service/Postgresql::Server::Instance::Service[main]/Anchor[postgresql::server::service::begin::main]: Dependency Postgresql_conf[data_directory_for_instance_main] has failures: true
[...]
Error: Could not find a suitable provider for postgresql_conf

Originally posted by @smortex in #1450 (comment)

That's surprising, don't we have CI with windows nodes?