Error with option consoleUseXkbConfig set to true

$ sudo nixos-rebuild --show-trace switch
building Nix...
building the system configuration...
error: while evaluating the attribute ‘buildCommand’ of the derivation ‘nixos-system-nixos-17.09.1880.ac2bb5684c’ at /nix/store/rl6zjkicx46h5sl89x7i2mjgarh7dkf6-nixos-17.09.1880.ac2bb5684c/nixos/pkgs/stdenv/generic/make-derivation.nix:98:11:
while evaluating ‘optionalString’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/strings.nix:138:26, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/activation/top-level.nix:39:9:
while evaluating the attribute ‘exportReferencesGraph’ of the derivation ‘initrd’ at /nix/store/rl6zjkicx46h5sl89x7i2mjgarh7dkf6-nixos-17.09.1880.ac2bb5684c/nixos/pkgs/stdenv/generic/make-derivation.nix:98:11:
while evaluating the attribute ‘preLVMCommands’ of the derivation ‘stage-1-init.sh’ at /nix/store/rl6zjkicx46h5sl89x7i2mjgarh7dkf6-nixos-17.09.1880.ac2bb5684c/nixos/pkgs/stdenv/generic/make-derivation.nix:98:11:
while evaluating the attribute ‘preLVMCommands’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:199:44:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:75:45, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:199:52:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:312:9:
while evaluating the option `boot.initrd.preLVMCommands':
while evaluating the attribute ‘mergedValue’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:339:5:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:339:32, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:339:19:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:434:23:
while evaluating the attribute ‘value.content’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:496:14:
while evaluating the attribute ‘buildCommand’ of the derivation ‘keymap’ at /nix/store/rl6zjkicx46h5sl89x7i2mjgarh7dkf6-nixos-17.09.1880.ac2bb5684c/nixos/pkgs/stdenv/generic/make-derivation.nix:98:11:
while evaluating the attribute ‘i18n.consoleKeyMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:199:44:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:75:45, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:199:52:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:312:9:
while evaluating the option `i18n.consoleKeyMap':
while evaluating the attribute ‘mergedValue’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:339:5:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:339:32, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:339:19:
while evaluating ‘mergeDefaultOption’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/options.nix:50:29, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:342:8:
Cannot merge definitions of `i18n.consoleKeyMap' given in `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/config/i18n.nix' and `/etc/nixos/configuration.nix'.