diff --git a/flake.lock b/flake.lock
index fea8e52..19b2543 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,25 @@
 {
   "nodes": {
+    "hjem": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1737619027,
+        "narHash": "sha256-jEzZs9dHdmVP5X9HCC/7jrv08aWFfqZV5cZ+cZWYGA4=",
+        "owner": "feel-co",
+        "repo": "hjem",
+        "rev": "48cfa21987672a31a358b7e4d582fc174556e633",
+        "type": "github"
+      },
+      "original": {
+        "owner": "feel-co",
+        "repo": "hjem",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1737469691,
@@ -18,7 +38,24 @@
     },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "hjem": "hjem",
+        "nixpkgs": "nixpkgs",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 3a54c19..2d7a2ad 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,33 +1,52 @@
 {
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    systems.url = "github:nix-systems/default";
+
+    hjem = {
+      url = "github:feel-co/hjem";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = {
     self,
     nixpkgs,
+    systems,
+    hjem,
     ...
   }: let
-    inherit (nixpkgs) lib;
+    forAllSystems = function:
+      nixpkgs.lib.genAttrs (import systems) (system: function nixpkgs.legacyPackages.${system});
 
-    forAllSystems = fn:
-      lib.genAttrs lib.systems.flakeExposed (
-        system:
-          fn (
-            import nixpkgs {
-              inherit system;
-              config.allowUnfree = true;
-            }
-          )
-      );
+    loadPackages = pkgs: let
+      packageNames = builtins.attrNames (builtins.readDir ./pkgs);
+    in
+      nixpkgs.lib.genAttrs packageNames (name: pkgs.callPackage (./pkgs + "/${name}") {});
+
+    loadModules = dir: let
+      moduleNames = builtins.attrNames (builtins.readDir dir);
+    in
+      nixpkgs.lib.genAttrs moduleNames (name: import (dir + "/${name}"));
+
+    loadOverlays = let
+      overlayNames = builtins.attrNames (builtins.readDir ./overlays);
+    in
+      nixpkgs.lib.genAttrs overlayNames (name: import (./overlays + "/${name}"));
   in {
-    formatter = forAllSystems (pkgs: pkgs.alejandra);
-    overlays.default = _: prev: self.packages.${prev.stdenv.hostPlatform.system} or {};
+    packages = forAllSystems loadPackages;
+
+    nixosModules = loadModules ./modules/nixos;
+    hjemModules = loadModules ./modules/hjem;
+
+    overlays = loadOverlays;
   };
+
   nixConfig = {
-    extra-substituters = ["https://blahai.cachix.org"];
+    extra-substituters = ["https://blahai.cachix.org" "https://nix-community.cachix.org/"];
     extra-trusted-public-keys = [
       "blahai.cachix.org-1:7Pg+JDWpcIogeN3HesRnOb4dl6FSwl/ZHC+QUmb65So="
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
     ];
   };
 }
diff --git a/modules/hjem/default.nix b/modules/hjem/default.nix
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/modules/hjem/default.nix
@@ -0,0 +1 @@
+{}
diff --git a/modules/nixos/default.nix b/modules/nixos/default.nix
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/modules/nixos/default.nix
@@ -0,0 +1 @@
+{}
diff --git a/overlays/default.nix b/overlays/default.nix
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/overlays/default.nix
@@ -0,0 +1 @@
+{}
diff --git a/pkgs/jkps/default.nix b/pkgs/jkps/default.nix
new file mode 100644
index 0000000..b9f8f97
--- /dev/null
+++ b/pkgs/jkps/default.nix
@@ -0,0 +1,30 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  cmake,
+  sfml,
+}:
+stdenv.mkDerivation rec {
+  pname = "jkps";
+  version = "0.3";
+
+  src = fetchFromGitHub {
+    owner = "JekiTheMonkey";
+    repo = "JKPS";
+    rev = "6d144f511ab8124d5947cfdada77e5584e002a9b";
+    sha256 = "sha256-NveKqapYq//8COndyUpSP8dHiKfTkiH7Yy6b+zdaxtQ=";
+  };
+
+  buildInputs = [cmake sfml];
+
+  installPhase = ''
+    install -D -m777 ./JKPS "$out/bin/JKPS"
+  '';
+
+  meta = {
+    description = "A keys-per-second meter for rhythm games, useful for streaming and making videos";
+    homepage = "https://github.com/JekiTheMonkey/JKPS";
+    license = lib.licenses.mit;
+  };
+}