Improve entangled worlds

flake.nix

@@ -13,7 +13,16 @@
         "aarch64-darwin"
       ];
       forAllSystems =
-        f: nixpkgs.lib.genAttrs allSystems (system: f { pkgs = import nixpkgs { inherit system; }; });
+        f:
+        nixpkgs.lib.genAttrs allSystems (
+          system:
+          f {
+            pkgs = import nixpkgs {
+              inherit system;
+              config.allowUnfree = true;
+            };
+          }
+        );
     in
     {
       overlays = {

pkgs/noita-entangled-worlds/default.nix

@@ -1,5 +1,4 @@
 {
-  lib,
   alsa-lib,
   gtk3,
   fetchFromGitHub,
@@ -11,9 +10,10 @@
   cmake,
   libopus,
   steam-run,
+  writeShellApplication,
 }:
-
-rustPlatform.buildRustPackage rec {
+let
+  entangled = rustPlatform.buildRustPackage rec {
     pname = "noita-entangled-worlds-proxy";
     version = "v1.5.1";
 
@@ -39,24 +39,25 @@ rustPlatform.buildRustPackage rec {
       pkg-config
       python3
       cmake
-    steam-run
     ];
     preInstall = ''
       mkdir -p $out/share/lib64/noita-proxy
-    cp ${src}/redist/libsteam_api.so $out/share/lib64/noita-proxy
-  '';
-  postInstall = ''
-    mv $out/bin/noita-proxy $out/bin/noita-proxy-unwrapped
-    cat > $out/bin/noita-proxy <<EOF
-      #!/usr/bin/env bash
-
-      export LD_PRELOAD=$out/share/lib64/noita-proxy/libsteam_api.so
-      exec ${steam-run}/bin/steam-run $out/bin/noita-proxy-unwrapped
-    EOF
-    chmod +x $out/bin/noita-proxy
+      cp -r ${src}/redist/libsteam_api.so $out/share/lib64/noita-proxy
     '';
     checkFlags = [
       # reason for disabling test
       "--skip=bookkeeping::releases::test::release_assets"
     ];
+  };
+in
+writeShellApplication {
+  name = "noita-proxy-${entangled.version}";
+  runtimeInputs = [
+    entangled
+    steam-run
+  ];
+  text = ''
+    export LD_PRELOAD=${entangled}/share/lib64/noita-proxy/libsteam_api.so
+    exec steam-run "${entangled}/bin/noita-proxy" "$@"
+  '';
 }