diff --git a/default.nix b/default.nix
index 1240f1d4a..fb12aa75c 100644
--- a/default.nix
+++ b/default.nix
@@ -163,6 +163,27 @@ rec {
     };
   };
 
+  projects = make-projects raw-projects;
+
+  # TODO: remove after migrating to modules
+  # ===
+
+  raw-projects-new = import ./projects/default-module.nix {
+    inherit lib;
+    pkgs = pkgs // ngipkgs;
+    sources = {
+      inputs = sources;
+      modules = nixos-modules;
+      inherit examples;
+    };
+  };
+
+  # TODO: delete the file after migrating to modules
+  projects-new = make-projects raw-projects-new.config.projects;
+
+  # TODO:
+  # ===
+
   project-models = import ./projects/models.nix { inherit lib pkgs sources; };
 
   # we mainly care about the types being checked
@@ -176,7 +197,8 @@ rec {
     pkgs.writeText "dummy" (lib.strings.toJSON project-metadata);
 
   # TODO: find a better place for this
-  projects =
+  make-projects =
+    projects:
     with lib;
     let
       nixosTest =
@@ -243,7 +265,7 @@ rec {
           ) ((empty-if-null project.nixos.tests or { }) // (filter-map (nixos.examples or { }) "tests"));
         };
     in
-    mapAttrs (name: project: hydrate project) raw-projects;
+    mapAttrs (name: project: hydrate project) projects;
 
   shell = pkgs.mkShellNoCC {
     packages = [
diff --git a/flake.nix b/flake.nix
index 932501f79..8fc49bac2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -79,18 +79,36 @@
         in
         rec {
           packages = ngipkgs // {
-            overview = import ./overview {
-              inherit
-                lib
-                lib'
-                self
-                nixpkgs
-                system
-                ;
-              pkgs = pkgs // ngipkgs;
-              projects = ngiProjects;
-              options = optionsDoc.optionsNix;
-            };
+            overview =
+              let
+                overview-new = import ./overview {
+                  inherit
+                    lib
+                    lib'
+                    self
+                    nixpkgs
+                    system
+                    ;
+                  pkgs = pkgs // ngipkgs;
+                  projects = classic.projects-new;
+                  options = optionsDoc.optionsNix;
+                };
+                overview-old = import ./overview {
+                  inherit
+                    lib
+                    lib'
+                    self
+                    nixpkgs
+                    system
+                    ;
+                  pkgs = pkgs // ngipkgs;
+                  projects = ngiProjects;
+                  options = optionsDoc.optionsNix;
+                };
+              in
+              # TODO: switch to overview-new
+              assert overview-old == overview-new;
+              overview-old;
 
             options =
               pkgs.runCommand "options.json"