pointing root index.php to wp/home.php

Hi,
I’m setting up a blog that has a semi-static main page (static content at top with loop following) at domain.com/wp/home.php.

Now I want to have domain.com/index.php point to wp/home.php.

domain.com/wp/index.php includes:

require('./wp-blog-header.php');

which brings up wp/home.php, great.

but when I edit domain.com/index.php to include:

require('./wp/wp-blog-header.php');

the blog comes up but not home.php. I can’t figure out what I need to change to solve this without moving the blog into the root. Any help appreciated!