diff --git a/flake.lock b/flake.lock
index c2c0455..c8027f6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,29 @@
 {
   "nodes": {
+    "base": {
+      "inputs": {
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "gradle2nix": "gradle2nix",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1752220426,
+        "narHash": "sha256-4zLXFFq93mh2+1n+c5wPMdSZtRxbRS/d8kxQ/MkiKjE=",
+        "ref": "refs/heads/master",
+        "rev": "20598b65db7941d225095cdc97969fb1104a53d4",
+        "revCount": 600,
+        "type": "git",
+        "url": "https://git.orleander.pl/bartek/base.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.orleander.pl/bartek/base.git"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -18,6 +42,32 @@
         "type": "github"
       }
     },
+    "gradle2nix": {
+      "inputs": {
+        "flake-utils": [
+          "base",
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "base",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1743629487,
+        "narHash": "sha256-MjnEgT9MhO2HknLhrx7GvBRVxdOzSKydIJMyzawe2Fk=",
+        "owner": "tadfisher",
+        "repo": "gradle2nix",
+        "rev": "293ecbdc10d32d9d4bdc2d23213b9be09ce247ee",
+        "type": "github"
+      },
+      "original": {
+        "owner": "tadfisher",
+        "ref": "v2",
+        "repo": "gradle2nix",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1751943650,
@@ -35,6 +85,7 @@
     },
     "root": {
       "inputs": {
+        "base": "base",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
diff --git a/flake.nix b/flake.nix
index d6b7ab7..124e08e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,7 +3,12 @@
 
   inputs = {
     nixpkgs.url = "nixpkgs/nixos-25.05";
+
     flake-utils.url = "github:numtide/flake-utils";
+
+    base.url = "git+https://git.orleander.pl/bartek/base.git";
+    base.inputs.nixpkgs.follows = "nixpkgs";
+    base.inputs.flake-utils.follows = "flake-utils";
   };
 
   outputs = inputs @ {
diff --git a/game.nix b/game.nix
index eb22739..8ebc5c7 100644
--- a/game.nix
+++ b/game.nix
@@ -1,5 +1,6 @@
 {
   pkgs,
+  base,
   lib,
   stdenv,
   system,
@@ -17,20 +18,22 @@ stdenv.mkDerivation rec {
   pname = "base-demo";
   version = "0.0.1";
 
-  src = pkgs.requireFile {
-    name = "${pname}-jar-${version}.jar";
-    sha256 = "0k0zh3zccz1sgdqgc97glb6i2rb2459lp89j9s6hyvlzpk86sy5z";
-    message = "Please compile the game with BASE game designer, then rename the output 'game.jar' file to '${pname}-jar-${version}.jar' and add it to store before proceeding.";
-  };
+  src = ./.;
 
-  dontUnpack = true;
+  nativeBuildInputs = [base.packages.${system}.default makeWrapper];
 
-  nativeBuildInputs = [makeWrapper];
+  buildPhase = ''
+    base-editor -bHp $src/project.json -o build
+  '';
 
   installPhase = ''
     mkdir -p $out/bin
+    mkdir -p $out/share/java
+
+    cp build/out/game.jar $out/share/java/base-demo-game.jar
+
     makeWrapper "${jdk17}/bin/java" $out/bin/base-demo \
-      --add-flags "-jar ${src}" \
+      --add-flags "-jar $out/share/java/base-demo-game.jar" \
       --prefix LD_LIBRARY_PATH : "${xorg.libXtst}/lib" \
       --prefix LD_LIBRARY_PATH : "${openjfx17}/lib" \
       --prefix LD_LIBRARY_PATH : "${glib.out}/lib" \