treewide. complete refactor

Lots of cleaning up, I cannot be arsed to commit everything one-by-one

flake.nix

@@ -11,12 +11,38 @@
     };
   };
 
-  outputs = inputs @ {flake-parts, ...}:
-    flake-parts.lib.mkFlake {inherit inputs;} {
+  outputs = {
+    nixpkgs,
+    flake-parts,
+    self,
+    ...
+  } @ inputs: let
+    pins = import ./npins;
+  in
+    flake-parts.lib.mkFlake {inherit inputs self;} {
       systems = ["x86_64-linux" "aarch64-linux"];
-      imports = [./pkgs];
+      imports = [flake-parts.flakeModules.easyOverlay];
+
+      perSystem = {
+        system,
+        config,
+        pkgs,
+        lib,
+        ...
+      }: let
+        inherit (lib.filesystem) packagesFromDirectoryRecursive;
+      in {
+        _module.args.pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+        };
+
+        overlayAttrs = config.packages;
+        packages = packagesFromDirectoryRecursive {
+          callPackage = lib.callPackageWith (pkgs // {inherit pins;});
+          directory = ./pkgs;
+        };
 
-      perSystem = {pkgs, ...}: {
         formatter = pkgs.alejandra;
         devShells.default = with pkgs; mkShell {buildInputs = [npins];};
       };