add upgrade-diff

flake.nix

@@ -119,7 +119,6 @@
           config.allowUnfree = true;
           config.permittedInsecurePackages = [
             "python-2.7.18.6"
-            # "openssl-1.1.1u"
           ];
 
           overlays = [
@@ -141,7 +140,6 @@
               landingpage = landingpage.packages.${system}.plain;
               trilium-server = nixpkgs-unstable.legacyPackages.${system}.trilium-server;
               kmonad = kmonad.packages.${system}.kmonad;
-              #deploy-rs = deploy-rs.packages.${system}.deploy-rs;
             })
             (import ./nixos/pkgs)
           ];
@@ -153,6 +151,7 @@
       };
 
       # todo : why redefine it?
+      # Mic92 means, is not needed anymore
       nixosSystem = args:
         (lib.makeOverridable lib.nixosSystem)
           (lib.recursiveUpdate args {