NIXPKG1 http://nixos.org/releases/nixpkgs/nixpkgs-0.12/MANIFEST user-mode-linux-2.6.20.21 i686-linux /nix/store/klxizlw5wg5gkwc9569qp374gfdkayg2-user-mode-linux-2.6.20.21.drv /nix/store/3cv669xxvmanqsh3h6j7sn4nvph24d8l-user-mode-linux-2.6.20.21