Here's the app.psgi file if you want to run ikiwiki with PSGI instead of apache or other web servers:

use Plack::App::CGIBin;
use Plack::Builder;
use Plack::App::File;

builder {
    mount '/ikiwiki.cgi' => Plack::App::CGIBin->new(file => './ikiwiki.cgi')->to_app;
    enable "Plack::Middleware::Static",
        path => sub { s!(^(?:/[^.]*)?/?$)!${1}/index.html! },
            root => '.';
    mount '/' => Plack::App::File->new(root => ".")->to_app;

Put it in your destdir and now your can run plackup -p <port>.

Note that you should configure your url and cgiurl to point to the listening address of plackup.

Also, the app.psgi residing in the destdir means that /app.psgi is accessible from the web server.

Hopefully some day ikiwiki web ui will speak psgi natively.