nixos: autoUpgrade: fetch flake inputs conditionally on having a flake

1 files changed, 8 insertions, 6 deletions

diff --git a/modules/nixos/personal/nix.nix b/modules/nixos/personal/nix.nix
index b85f550..17df364 100644
--- a/modules/nixos/personal/nix.nix
+++ b/modules/nixos/personal/nix.nix
@@ -140,12 +140,14 @@ in {
         checkNetwork
         {
           path = [config.nix.package];
-          preStart = lib.mkAfter ''
-            echo "Downloading input flakes..."
-            nix flake archive ${cfg.flake}
-            echo "Evaluating configuration..."
-            ${config.system.build.nixos-rebuild}/bin/nixos-rebuild dry-build ${toString config.system.autoUpgrade.flags}
-          '';
+          preStart = lib.mkAfter (lib.optionalString hasFlake ''
+              echo "Downloading flake inputs..."
+              nix flake archive ${cfg.flake}
+            ''
+            + ''
+              echo "Evaluating configuration..."
+              ${config.system.build.nixos-rebuild}/bin/nixos-rebuild dry-build ${toString config.system.autoUpgrade.flags}
+            '');
           personal.monitor = true;
         }
         (let