Neovim

Configure Neovim as the default Editor

Add this to your configuration.nix environment.variables.EDITOR = "nvim";

Set Neovim as vi and vim

 nixpkgs.overlays = [
   (self: super: {
     neovim = super.neovim.override {
       viAlias = true;
       vimAlias = true;
     };
   })
 ];

See Also

Vim