treewide: set defaultText for options using simple path defaults

adds defaultText for all options that set their default to a path expression
using the ubiquitous `cfg` shortcut bindings.

1 files changed, 3 insertions, 1 deletions

diff --git a/nixos/modules/misc/version.nix b/nixos/modules/misc/version.nix
index 8f246a9278b..fc0d65d5148 100644
--- a/nixos/modules/misc/version.nix
+++ b/nixos/modules/misc/version.nix
@@ -1,9 +1,10 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, options, pkgs, ... }:
 
 with lib;
 
 let
   cfg = config.system.nixos;
+  opt = options.system.nixos;
 in
 
 {
@@ -53,6 +54,7 @@ in
     stateVersion = mkOption {
       type = types.str;
       default = cfg.release;
+      defaultText = literalExpression "config.${opt.release}";
       description = ''
         Every once in a while, a new NixOS release may change
         configuration defaults in a way incompatible with stateful