NixOS/nixpkgs — pull request #768 by bjornfor (2013-07-18 01:22:24+00:00)
Title: Remove the old KQEMU accelerator module

KQEMU was a linux kernel module for accelerating the QEMU virtual
machine on x86 hardware. Since QEMU 0.11 (and up), there is no support
for KQEMU any more, the focus is now on KVM.

http://wiki.qemu.org/KQemu/Doc