security.sudo.extraConfig: fix default behavior

1 files changed, 7 insertions, 3 deletions

diff --git a/modules/security/sudo.nix b/modules/security/sudo.nix
index 99ada11..c0d9597 100644
--- a/modules/security/sudo.nix
+++ b/modules/security/sudo.nix
@@ -12,8 +12,8 @@ in
 
   options = {
     security.sudo.extraConfig = mkOption {
-      type = types.lines;
-      default = "";
+      type = types.nullOr types.lines;
+      default = null;
       description = mdDoc ''
         Extra configuration text appended to {file}`sudoers`.
       '';
@@ -21,6 +21,10 @@ in
   };
 
   config = {
-    environment.etc."sudoers.d/10-nix-darwin-extra-config".text = lib.mkIf (cfg.extraConfig != "") cfg.extraConfig;
+    environment.etc = {
+      "sudoers.d/10-nix-darwin-extra-config" = mkIf (cfg.extraConfig != null) {
+        text = cfg.extraConfig;
+      };
+    };
   };
 }