NixOS/nixpkgs — pull request #5208 by ehmry (2014-12-02 17:10:12+00:00)
Title: Ipxe

This adds an option to boot an iPXE script from the GRUB2 menu. That is, to install a netboot configuration to /boot.

Now the trick would be to get Hydra to build signed image that can be booted over the network...