Remove absolute path to neovim

configuration.nix

@@ -29,11 +29,14 @@ in
   # Enable completions by nix
   programs.fish.enable = true;
 
+  # set neovim as default
+  programs.neovim.defaultEditor = true;
+
   environment = {
     shells = [ pkgs.fish ];
     variables = {
-      EDITOR = "/run/current-system/sw/bin/nvim";
-      VISUAL = "/run/current-system/sw/bin/nvim";
+      EDITOR = "nvim";
+      VISUAL = "nvim";
     };
     # remove nano from default packages
     defaultPackages = [ pkgs.perl pkgs.rsync pkgs.strace ];