diff --git a/custom/pkgs/by-category/pythonPackages/prefab-builder.nix b/custom/pkgs/by-category/pythonPackages/prefab-builder.nix
new file mode 100644
index 0000000..cbe5cf9
--- /dev/null
+++ b/custom/pkgs/by-category/pythonPackages/prefab-builder.nix
@@ -0,0 +1,8 @@
+let
+  prefab = import ../../../lib/prefab.nix {
+    inherit lib fetchFromGitHub fetchPypi;
+    inherit (python.pkgs) buildPythonPackage setuptools wheel;
+    python = python;
+  };
+in
+prefab.mkPrefabsRec (import ./prefab-specs.nix)
diff --git a/custom/pkgs/by-category/pythonPackages/prefabs-specs.nix b/custom/pkgs/by-category/pythonPackages/prefab-specs.nix
similarity index 88%
rename from custom/pkgs/by-category/pythonPackages/prefabs-specs.nix
rename to custom/pkgs/by-category/pythonPackages/prefab-specs.nix
index 2e973d7..307ff42 100644
--- a/custom/pkgs/by-category/pythonPackages/prefabs-specs.nix
+++ b/custom/pkgs/by-category/pythonPackages/prefab-specs.nix
@@ -53,19 +53,28 @@
   torchvision,
 
   wcwidth,
+
+  matplotlib,
+  pyyaml,
+  scipy,
+  psutil,
+  py-cpuinfo,
+  thop,
+  seaborn,
+  albumentations,
 }:
 
-rec {
+self: {
   raganything = {
     url = "https://github.com/HKUDS/RAG-Anything/tree/v1.2.9";
     hash = "sha256-yepiLYzPD6UcJRbAbovg/BwFE8nh903o/tHypiHGKSw=";
     propagatedBuildDeps = [
       huggingface-hub
-      lightrag-hku
+      self.lightrag-hku
       tqdm
       # mineru
     ]
-    ++ mineru.optional-dependencies.core;
+    ++ self.mineru.optional-dependencies.core;
     pythonImportsCheck = [ "raganything" ];
     meta = {
       description = "RAGAnything: All-in-One RAG System";
@@ -81,11 +90,11 @@ rec {
       google-api-core
       google-genai
       json-repair
-      nano-vectordb
+      self.nano-vectordb
       networkx
       numpy
       pandas
-      pipmaster
+      self.pipmaster
       pydantic
       pypinyin
       python-dotenv
@@ -103,7 +112,7 @@ rec {
     hash = "sha256-IJ6VG4WvoEm584vbZDLTtRcEZekZh7HJto1hnABoodo=";
     force.version = "1.1.0";
     propagatedBuildDeps = [
-      ascii-colors
+      self.ascii-colors
     ];
     meta = with lib; {
       description = "A versatile Python package manager utility for simplifying package installation, updates, checks, and environment management.";
@@ -150,21 +159,21 @@ rec {
       pypdfium2
       pypdf
       reportlab
-      pdftext
+      self.pdftext
       modelscope
       huggingface-hub
       json-repair
       opencv-python
-      fast-langdetect
+      self.fast-langdetect
       scikit-image
       openai
       beautifulsoup4
       magika
-      mineru-vl-utils
-      qwen-vl-utils
+      self.mineru-vl-utils
+      self.qwen-vl-utils
     ];
     optional-dependencies = {
-      core = [ doclayout-yolo ]
+      core = [ self.doclayout-yolo ]
       # ++ (with mineru.optional-dependencies; [
       #   vlm
       #   pipeline
@@ -174,7 +183,7 @@ rec {
       ;
       vlm = [ ];
       pipeline = [
-        doclayout-yolo
+        self.doclayout-yolo
       ];
       api = [ ];
       gradio = [ ];
@@ -189,9 +198,26 @@ rec {
   };
   doclayout-yolo = {
     # reason for creating fetcher construct
-    url = "https://github.com/opendatalab/DocLayout-YOLO/tree/main"; # master is 10 months old and last version was set in Oct 18, 2024
+    url = "https://pypi.org/project/doclayout-yolo/0.0.4/"; # master is 10 months old and last version was set in Oct 18, 2024
     hash = "sha256-wLCmJuWyw7Gqou7awsHtxqVyr4AN+yJSkF0q3GUSQh8=";
-    force.version = "0.0.4"; # NOT 0.0.4 on github but fuck it we ball
+    # force.version = "0.0.4"; # NOT 0.0.4 on github but fuck it we ball
+    propagatedBuildDeps = [
+      matplotlib
+      opencv-python
+      pillow
+      pyyaml
+      requests
+      scipy
+      torch
+      torchvision
+      tqdm
+      psutil
+      py-cpuinfo
+      thop
+      pandas
+      seaborn
+      albumentations
+    ];
     meta = {
       description = "DocLayout-YOLO: Enhancing Document Layout Analysis through Diverse Synthetic Data and Global-to-Local Adaptive Perception";
       license = lib.licenses.agpl3Only;
@@ -223,7 +249,7 @@ rec {
     hash = "sha256-hpTW/1nwXPxfld4nx0XHZBMerWj+UL1vzDhYpwjezRU=";
     propagatedBuildDeps = [
       httpx
-      httpx-retries
+      self.httpx-retries
       aiofiles
       pillow
       pydantic
@@ -253,7 +279,7 @@ rec {
     hash = "sha256-pj46gHG9cjkSjnYc88bSctL/1LAUe0jkBuM/GZWMsUI=";
     propagatedBuildDeps = [
       pdm-backend
-      robust-downloader
+      self.robust-downloader
       requests
       fasttext-predict
     ];
diff --git a/custom/pkgs/lib/prefab.nix b/custom/pkgs/lib/prefab.nix
index 25b2dc9..0c0ca1a 100644
--- a/custom/pkgs/lib/prefab.nix
+++ b/custom/pkgs/lib/prefab.nix
@@ -15,13 +15,14 @@ let
     {
       url,
       hash,
-      force ? { }, # overrides: pname/version/rev/subdir/sourceRootBase/homepage/src
+      force ? { },
       meta ? { },
+      passthru ? { },
       propagatedBuildDeps ? [ ],
       nativeBuildDeps ? [ ],
       pythonRelaxDeps ? [ ],
       pythonImportsCheck ? null,
-      optional-dependencies ? null,
+      optional-dependencies ? { },
     }:
     let
       ref = parseRef url;
@@ -52,8 +53,7 @@ let
           (
             assert (force.version or ref.version or null) != null;
             fetchPypi {
-              inherit pname version;
-              inherit hash;
+              inherit pname version hash;
             }
           )
         else
@@ -66,50 +66,53 @@ let
       imports = if pythonImportsCheck == null then defaultImports else pythonImportsCheck;
 
       homepage = force.homepage or ref.homepage;
+
+      passthru' =
+        passthru
+        // lib.optionalAttrs (optional-dependencies != { }) {
+          optional-dependencies = optional-dependencies;
+        };
     in
     buildPythonPackage (
-      (
-        {
-          inherit pname version src;
-          pyproject = true;
+      ({
+        inherit pname version src;
+        pyproject = true;
 
-          build-system = [
-            setuptools
-            wheel
-          ]
-          ++ nativeBuildDeps;
-          dependencies = propagatedBuildDeps;
-          pythonRelaxDeps = pythonRelaxDeps;
-          pythonImportsCheck = imports;
+        build-system = [
+          setuptools
+          wheel
+        ]
+        ++ nativeBuildDeps;
+        dependencies = propagatedBuildDeps;
+        pythonRelaxDeps = pythonRelaxDeps;
 
-          installCheckPhase = ''
-            runHook preInstallCheck
-            ${builtins.concatStringsSep "\n" (
-              map (mod: ''
-                ${python.interpreter} -c "import ${mod}; print(getattr(${mod},'__version__','unknown'))"
-              '') imports
-            )}
-            runHook postInstallCheck
-          '';
+        pythonImportsCheck = imports;
 
-          meta = {
-            inherit homepage;
-          }
-          // meta;
+        installCheckPhase = ''
+          runHook preInstallCheck
+          ${builtins.concatStringsSep "\n" (
+            map (mod: ''
+              ${python.interpreter} -c "import ${mod}; print(getattr(${mod},'__version__','unknown'))"
+            '') imports
+          )}
+          runHook postInstallCheck
+        '';
+
+        passthru = passthru';
+
+        meta = {
+          inherit homepage;
         }
-        // lib.optionalAttrs (optional-dependencies != null) {
-          optional-dependencies = optional-dependencies;
-        }
-      )
+        // meta;
+      })
       // lib.optionalAttrs (subdir != null && subdir != "") {
         sourceRoot = "${sourceRootBase}/${subdir}";
       }
     );
-
-  # 핵: specs = { pkgA = { url=...; hash=...; ...; }; ...; }
-  # -> { pkgA = mkPrefab specs.pkgA; ...; }
   mkPrefabs = specs: lib.mapAttrs (_: spec: mkPrefab spec) specs;
+
+  mkPrefabsRec = specsFn: lib.fix (self: mkPrefabs (specsFn self));
 in
 {
-  inherit mkPrefab mkPrefabs;
+  inherit mkPrefab mkPrefabs mkPrefabsRec;
 }