feat!: switch to full flake-parts

pkgs/default.nix

@@ -1,5 +1,11 @@
-{ lib, pkgs, ... }:
+{ self, lib, pkgs, ... }:
 let
+  mkPackages = names: pkgs: builtins.listToAttrs (map
+    (name: {
+      inherit name;
+      value = pkgs.callPackage "${self}/pkgs/${name}" { inherit self name; };
+    })
+    names);
   packageNames = lib.swarselsystems.readNix "pkgs";
 in
-lib.swarselsystems.mkPackages packageNames pkgs
+mkPackages packageNames pkgs