diff --git a/modules/nilla/builders/custom-load.nix b/modules/nilla/builders/custom-load.nix
new file mode 100644
index 0000000..b89bc36
--- /dev/null
+++ b/modules/nilla/builders/custom-load.nix
@@ -0,0 +1,13 @@
+{ lib }:
+{
+  config.builders.custom-load = {
+    settings.type = lib.types.submodule {
+      options.args = lib.options.create {
+        type = lib.types.null;
+        default.value = null;
+      };
+    };
+    settings.default = { };
+    build = pkg: lib.attrs.generate pkg.systems (system: pkg.package { inherit system; });
+  };
+}
diff --git a/modules/nilla/builders/default.nix b/modules/nilla/builders/default.nix
new file mode 100644
index 0000000..fa73437
--- /dev/null
+++ b/modules/nilla/builders/default.nix
@@ -0,0 +1,6 @@
+{
+  includes = [
+    ./nixpkgs-flake.nix
+    ./custom-load.nix
+  ];
+}
diff --git a/modules/nilla/builders/nixpkgs-flake.nix b/modules/nilla/builders/nixpkgs-flake.nix
new file mode 100644
index 0000000..a57b0e7
--- /dev/null
+++ b/modules/nilla/builders/nixpkgs-flake.nix
@@ -0,0 +1,26 @@
+{
+  config,
+  lib,
+}:
+{
+  config.builders.nixpkgs-flake = {
+    settings.type = lib.types.submodule {
+      options.args = lib.options.create {
+        type = lib.types.any;
+        default.value = { };
+      };
+    };
+    settings.default = { };
+    build =
+      pkg:
+      lib.attrs.generate pkg.systems (
+        system:
+        config.inputs.nixpkgs.result.legacyPackages.${system}.callPackage pkg.package (
+          {
+            self' = builtins.mapAttrs (_: pkg: pkg.result.${system}) config.packages;
+          }
+          // pkg.settings.args
+        )
+      );
+  };
+}
diff --git a/modules/nilla/default.nix b/modules/nilla/default.nix
new file mode 100644
index 0000000..f9e4319
--- /dev/null
+++ b/modules/nilla/default.nix
@@ -0,0 +1,3 @@
+{
+  includes = [ ./builders ];
+}
diff --git a/nilla.nix b/nilla.nix
index eb7bf6c..7fa2127 100644
--- a/nilla.nix
+++ b/nilla.nix
@@ -4,43 +4,13 @@
 (import inputs.nilla).create (
   { config, lib }:
   {
+    includes = [ ./modules/nilla ];
+
     config.inputs = builtins.mapAttrs (_: src: {
       inherit src;
       loader = "raw";
     }) inputs;
 
-    config.builders.nixpkgs-flake = {
-      settings.type = lib.types.submodule {
-        options.args = lib.options.create {
-          type = lib.types.any;
-          default.value = { };
-        };
-      };
-      settings.default = { };
-      build =
-        pkg:
-        lib.attrs.generate pkg.systems (
-          system:
-          inputs.nixpkgs.legacyPackages.${system}.callPackage pkg.package (
-            {
-              self' = builtins.mapAttrs (_: pkg: pkg.result.${system}) config.packages;
-            }
-            // pkg.settings.args
-          )
-        );
-    };
-
-    config.builders.custom-load = {
-      settings.type = lib.types.submodule {
-        options.args = lib.options.create {
-          type = lib.types.null;
-          default.value = null;
-        };
-      };
-      settings.default = { };
-      build = pkg: lib.attrs.generate pkg.systems (system: pkg.package { inherit system; });
-    };
-
     config.packages =
       let
         systems = [