In nixos, how to remap caps lock to control

nixos

I followed the instructions at this email thread, and placed

services.xserver.xkbOptions = "grp:alt_space_toggle, ctrl:swapcaps";

in my /etc/nixos/configuration.nix file, but even after rebuilding with $ nixos-rebuild switch, and rebooting with nixos-rebuild boot and reboot, my caps lock key is not remapped.

How to map caps-lock to ctrl in nixos?

Best Answer

As you already tried, and as grwlf suggests, you can enable this in X11 by adding services.xserver.xkbOptions = "ctrl:swapcaps"; to /etc/nixos/configuration.nix.

To apply this setting in outside of X11, you can add console.useXkbConfig = true; to the configuration. This will apply the X keymap to the console keymap, which affects virtual consoles such as tty.

UPDATE: i18n.consoleUseXkbConfig was renamed to console.useXkbConfig in NixOS version 20.03

Related Solutions

How to make a self-signed certificate persist in nixos

You didn't specify what certfile looks like in the first line. If it's a variable thats populated with a builtins.readFile, you can skip that step and just populate the variable yourself.

$> nixos-option security.pki.certificates
Value:
[ "-----BEGIN CERTIFICATE-----
... edited for brevity .... " ]

Default:
[ ]

Example:
[ "NixOS.org\n=========\n-----BEGIN CERTIFICATE-----\nMIIGUDCCBTigAwIBAgIDD8KWMA0GCSqGSIb3DQEBBQUAMIGMMQswCQYDVQQGEwJJ\nTDEWMBQGA1UEChMNU3RhcnRDb20gTHRkLjErMCkGA1UECxMiU2VjdXJlIERpZ2l0\n...\n-----END CERTIFICATE-----\n" ]

Description:

A list of trusted root certificates in PEM format.

Declared by:
  "/etc/nixos/nixpkgs/nixos/modules/security/ca.nix"

Defined by:
  "/etc/nixos/user.nix

So, setting security.pki.certificates [ "insert certificate here" ]; would eliminate the file dependency and then the configuration is self contained.

Otherwise, if you wanted to keep the content out of the configuration, you'd need to create packaging/a derivation for it and add it to the store.

How to set custom xkb_keymap in nixos

This is a temporary issue. A fix is in systemd, but the version of systemd isn't in NixOS yet:

https://github.com/systemd/systemd/commit/5016eb56352a7ea1f61ea106fa4f5639fbf6ddd8

I know what you're saying! "That's not an answer!" and I agree! Luckily, we have the option services.udev.extraHwdb, where we can add our own udev rules in configuartion.nix.

Here's the final fix that I have working now:

services.udev.extraHwdb = ''
  evdev:atkbd:dmi:bvn*:bvr*:bd*:svnPurism*:pn*Librem13v4*:pvr*
    KEYBOARD_KEY_56=backslash
''

Best Answer

Related Solutions

How to make a self-signed certificate persist in nixos

How to set custom xkb_keymap in nixos

Related Question