diff --git a/flake.nix b/flake.nix
index c8350d1..4fa7ed8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -219,6 +219,20 @@
                 }; in [
                   template.nixosConfigurations.default.config.system.build.toplevel
                   template.homeConfigurations.${username}.activationPackage
+
+                  # …and one representative disko script: its tool closure
+                  # (file, which, wrapper hooks, …) isn't otherwise on the
+                  # ISO, and offline nix would try to build it from source.
+                  # The user's actual args produce a different script drv,
+                  # but with identical inputs — built offline in seconds.
+                  (import "${pkgs.disko}/share/disko/cli.nix" {
+                    inherit pkgs;
+                    mode = "destroy,format,mount";
+                    diskoFile = ./pkgs/nomarchy-install/disko-config.nix;
+                    mainDrive = "/dev/vda";
+                    withLuks = true;
+                    swapSize = "2G";
+                  })
                 ]
               );
           }