diff --git a/flake.nix b/flake.nix
index 143ba4e..9fc8c89 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,21 +13,8 @@
     };
   };
 
-  nixConfig = {
-    extra-substituters = [
-      "https://nix-community.cachix.org"
-      "https://hsndev.cachix.org"
-    ];
-    extra-trusted-public-keys = [
-      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-      "hsndev.cachix.org-1:vN1/XGBZtMLnTFYDmTLDrullgZHSUYY3Kqt+Yg/C+tE="
-    ];
-    trusted-users = ["root" "gitea-runner"];
-  };
-
   outputs = { self, sops-nix, nixpkgs, srvos, disko, ... }@inputs:
   let
-    linuxMachineName = "linux";
     lib = nixpkgs.lib;
     inherit (self) outputs;
     in {
@@ -103,5 +90,14 @@
           }];
         };
       };
+      # Convenience output that aggregates the outputs for home, nixos.
+      # Also used in ci to build targets generally.
+      top =
+        let
+          nixtop = nixpkgs.lib.genAttrs
+            (builtins.attrNames inputs.self.nixosConfigurations)
+            (attr: inputs.self.nixosConfigurations.${attr}.config.system.build.toplevel);
+        in
+        nixtop;
   }; 
 }