fixed python packages AGAIN

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1772963539,
+        "narHash": "sha256-9jVDGZnvCckTGdYT53d/EfznygLskyLQXYwJLKMPsZs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9dcb002ca1690658be4a04645215baea8b95f31d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -30,7 +30,21 @@
           forFlakeOutputs = true;
         };
 
-      mkDefault = p: if p ? raganything then p.raganything else p.${builtins.head (lib.attrNames p)};
+      flakePythonPackages =
+        system:
+        import ./pkgs {
+          pkgs = pkgsFinal system;
+          prev = pkgsPrev system;
+          lib = (pkgsPrev system).lib;
+          forPythonScope = true;
+        };
+
+      mkDefault =
+        p:
+        let
+          directNames = lib.filter (name: lib.isDerivation p.${name}) (lib.attrNames p);
+        in
+        if p ? raganything then p.raganything else p.${builtins.head directNames};
     in
     {
       overlays.default = overlay;
@@ -42,5 +56,12 @@
         in
         p // { default = mkDefault p; }
       );
+
+      legacyPackages = forAllSystems (
+        system:
+        {
+          python3Packages = flakePythonPackages system;
+        }
+      );
     };
 }

pkgs/default.nix

@@ -3,10 +3,12 @@
   prev,
   lib,
   forFlakeOutputs ? false,
+  forPythonScope ? false,
   ...
 }:
 let
   dirs = path: lib.attrNames (lib.filterAttrs (_: t: t == "directory") (builtins.readDir path));
+  pythonPackagesDir = ./by-category/pythonPackages;
 
   packagesFromTree =
     base: callPackage:
@@ -48,5 +50,38 @@ let
   };
 
   overlayAttrs = byNamePkgs // byCategoryPkgs;
+  directFlakePackages = lib.filterAttrs (_: lib.isDerivation) overlayAttrs;
+
+  flakePythonPackages =
+    let
+      pyPkgs = if pkgs ? python313Packages then pkgs.python313Packages else pkgs.python3Packages;
+      treePkgs =
+        if builtins.pathExists pythonPackagesDir then
+          removeAttrs (packagesFromTree pythonPackagesDir pyPkgs.callPackage) [
+            "python-packages"
+          ]
+        else
+          { };
+      prefabPkgs =
+        if builtins.pathExists (pythonPackagesDir + "/prefab-builder.nix") then
+          prev.lib.customisation.callPackagesWith (
+            pyPkgs
+            // {
+              lib = prev.lib;
+              pkgs = prev;
+              pyPkgs = pyPkgs;
+              fetchFromGitHub = prev.fetchFromGitHub;
+              fetchPypi = prev.fetchPypi;
+            }
+          ) (pythonPackagesDir + "/prefab-builder.nix") { }
+        else
+          { };
     in
-if forFlakeOutputs then lib.filterAttrs (_: lib.isDerivation) overlayAttrs else overlayAttrs
+    treePkgs // prefabPkgs;
+in
+if forPythonScope then
+  flakePythonPackages
+else if forFlakeOutputs then
+  directFlakePackages
+else
+  overlayAttrs