diff --git a/pkgs/by-name/nx/nxengine-evo/assets.nix b/pkgs/by-name/nx/nxengine-evo/assets.nix
new file mode 100644
index 000000000000..70fb1b32759f
--- /dev/null
+++ b/pkgs/by-name/nx/nxengine-evo/assets.nix
@@ -0,0 +1,37 @@
+{ lib
+, stdenvNoCC
+, fetchzip
+}:
+
+stdenvNoCC.mkDerivation (finalAttrs: {
+  pname = "nxengine-assets";
+  version = "2.6.4";
+
+  src = fetchzip {
+    url = "https://github.com/nxengine/nxengine-evo/releases/download/v${finalAttrs.version}/NXEngine-v${finalAttrs.version}-Linux.tar.xz";
+    hash = "sha256-vBbbX6yBZ5CwdkxzO9Z/DjY1IMnKGKYNx6jzAgYUjcM=";
+  };
+
+  dontConfigure = true;
+  dontBuild = true;
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/share/nxengine/
+    cp -r data/ $out/share/nxengine/data
+
+    runHook postInstall
+  '';
+
+  meta = {
+    homepage = "https://github.com/nxengine/nxengine-evo";
+    description = "Assets for nxengine-evo";
+    license = with lib.licenses; [
+      unfreeRedistributable
+    ];
+    maintainers = with lib.maintainers; [ AndersonTorres ];
+    platforms = lib.platforms.all;
+    sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
+  };
+})
diff --git a/pkgs/by-name/nx/nxengine-evo/package.nix b/pkgs/by-name/nx/nxengine-evo/package.nix
index bd88fc3b19f4..4503c0ec9b2c 100644
--- a/pkgs/by-name/nx/nxengine-evo/package.nix
+++ b/pkgs/by-name/nx/nxengine-evo/package.nix
@@ -2,6 +2,7 @@
   lib,
   SDL2,
   SDL2_mixer,
+  callPackage,
   cmake,
   pkg-config,
   ninja,
@@ -61,31 +62,28 @@ stdenv.mkDerivation (finalAttrs: {
     sed -i -e "s,/usr/share/,$out/share/," src/ResourceManager.cpp
   '';
 
-  installPhase = let
-    assetsVersion = "2.6.4";
-    assets = fetchurl {
-      url = "https://github.com/nxengine/nxengine-evo/releases/download/v${assetsVersion}/NXEngine-v${assetsVersion}-Linux.tar.xz";
-      hash = "sha256-/pVXwv6HbI83ZsGVfShv1I01hbEm5iKQk9LCnHWdsKw=";
-    };
-  in ''
+  installPhase = ''
     runHook preInstall
 
     cd ..
-    unpackFile ${assets}
     mkdir -p $out/bin/ $out/share/nxengine/
     install bin/* $out/bin/
-    cp -r NXEngine-evo-${assetsVersion}-Linux/data/ $out/share/nxengine/data
+  '' + ''
+    cp -r ${finalAttrs.finalPackage.assets}/share/nxengine/data $out/share/nxengine/data
     chmod -R a=r,a+X $out/share/nxengine/data
-
+  '' + ''
     runHook postInstall
   '';
 
+  passthru = {
+    assets = callPackage ./assets.nix { };
+  };
+
   meta = {
     homepage = "https://github.com/nxengine/nxengine-evo";
     description = "A complete open-source clone/rewrite of the masterpiece jump-and-run platformer Doukutsu Monogatari (also known as Cave Story)";
     license = with lib.licenses; [
-      gpl3Plus # Game engine
-      unfreeRedistributable  # Game assets, freeware
+      gpl3Plus
     ];
     mainProgram = "nx";
     maintainers = with lib.maintainers; [ AndersonTorres ];