diff --git a/examples/_loader.nix b/examples/_loader.nix
index aae71ca..64fd6e8 100644
--- a/examples/_loader.nix
+++ b/examples/_loader.nix
@@ -7,5 +7,6 @@ inputs.haumea.lib.load {
   src = ./.;
   inputs = {
     inherit inputs lib;
+    inherit (lib) configs flake;
   };
 }
diff --git a/src/configs/haumea.nix b/src/configs/haumea.nix
index 80d0b34..87eea66 100644
--- a/src/configs/haumea.nix
+++ b/src/configs/haumea.nix
@@ -18,13 +18,14 @@ pop {
     inputs = { };
     init = {
       src = ./.;
-      loader = haumea.lib.loaders.default;
+      loader = with haumea.lib; [ (matchers.nix loaders.default) ];
       transformer = [ ];
       inputs = { };
       layout = "default";
     };
     mergedOutputs = { };
     imports = [ ];
+    loader = [ ];
     outputs = { };
   };
   extension = self: super: {
@@ -32,7 +33,7 @@ pop {
       l.removeAttrs
         (types.haumeaInit ({
           src = self.init.src;
-          loader = self.init.loader;
+          loader = self.loader ++ self.init.loader;
           layout = self.init.layout;
           transformer = self.init.transformer ++ self.transformer;
           inputs = l.removeAttrs (self.init.inputs // self.inputs) [ "self" ];
@@ -85,6 +86,16 @@ pop {
           )
         );
 
+    addLoader =
+      defun
+        (
+          with types; [
+            (list any)
+            haumeaPop
+          ]
+        )
+        (loader: extendPop self (self: super: { loader = super.loader ++ loader; }));
+
     addNixOSMerge =
       defun
         (
diff --git a/src/configs/structAttrs.nix b/src/configs/structAttrs.nix
index 501a9cf..94b212f 100644
--- a/src/configs/structAttrs.nix
+++ b/src/configs/structAttrs.nix
@@ -17,6 +17,7 @@ let
 
     haumeaPop = structAttrs.pop // rec {
       inputs = attrs any;
+      loader = list any;
       imports = list any;
       init = struct "haumea.load" {
         src = either path string;
@@ -35,6 +36,7 @@ let
 
       addTransformer = function;
       addInputs = function;
+      addLoader = function;
 
       addMerge = function;
       addNixOSMerge = function;
diff --git a/tests/_snapshots/haumea b/tests/_snapshots/haumea
index 1aa40f0..f323640 100644
--- a/tests/_snapshots/haumea
+++ b/tests/_snapshots/haumea
@@ -3,6 +3,9 @@
   data = {
     success = true;
     value = {
+      data = {
+        foo = "baz";
+      };
       editorconfig = {
         "*" = {
           charset = "utf-8";
diff --git a/tests/haumea/__data/data.nix b/tests/haumea/__data/data.nix
new file mode 100644
index 0000000..ab1e5aa
--- /dev/null
+++ b/tests/haumea/__data/data.nix
@@ -0,0 +1 @@
+with dmerge; merge { foo = "bar"; } { foo = "baz"; }
diff --git a/tests/haumea/expr.nix b/tests/haumea/expr.nix
index 5ca571c..fa5202e 100644
--- a/tests/haumea/expr.nix
+++ b/tests/haumea/expr.nix
@@ -44,12 +44,15 @@ let
       );
 
   default =
-    ((haumea.setInit {
+    with inputs.haumea.lib;
+    (((haumea.setInit {
       src = ./__data;
       inputs = {
         lib = inputs.nixlib.lib;
+        dmerge = inputs.dmerge;
       };
-      transformer = with inputs.haumea.lib.transformers; [ liftDefault ];
+      transformer = [ transformers.liftDefault ];
+      loader = [ ];
     }).addMerge
       (
         prev:
@@ -61,7 +64,10 @@ let
         prev:
         with dmerge;
         merge prev { treefmt.formatter.prettier.includes = append [ "*.jsl" ]; }
-      );
+      )
+    ).addLoader
+      [ (matchers.nix loaders.scoped) ];
+
   inherit (builtins) deepSeq mapAttrs tryEval;
 in
 mapAttrs (_: x: tryEval (deepSeq x x)) {