Set editor to neovim for visudo

config/sudoers

@@ -0,0 +1,19 @@
+# Don't edit this file. Set the NixOS options ‘security.sudo.configFile’
+# or ‘security.sudo.extraRules’ instead.
+
+# Set editor to nvim
+Defaults editor=/run/current-system/sw/bin/nvim
+
+# Keep SSH_AUTH_SOCK so that pam_ssh_agent_auth.so can do its magic.
+Defaults env_keep+=SSH_AUTH_SOCK
+
+# "root" is allowed to do anything.
+root        ALL=(ALL:ALL) SETENV: ALL
+
+# extraRules
+%wheel	ALL=(ALL:ALL)	SETENV: ALL
+
+
+# Keep terminfo database for root and %wheel.
+Defaults:root,%wheel env_keep+=TERMINFO_DIRS
+Defaults:root,%wheel env_keep+=TERMINFO

configuration.nix

@@ -85,6 +85,9 @@ in
     enable = true;
   };
 
+  # sudoers file
+  security.sudo.configFile = (builtins.readFile ./config/sudoers);
+
   # Configure keymap in X11
   services.xserver.layout = "ch";