pacman-game: build for Linux too, not just Darwin

Assisted-by: Claude:opus-4.8

pkgs/by-name/pa/pacman-game/package.nix

@@ -1,4 +1,5 @@
 {
+  installShellFiles,
   lib,
   stdenv,
   fetchFromGitHub,
@@ -7,6 +8,8 @@
 stdenv.mkDerivation (finalAttrs: {
   pname = "pacman-game";
   version = "0-unstable-2017-01-30";
+  strictDeps = true;
+  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "justinjo";
@@ -15,10 +18,18 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-2GwIv8XMbd8WZBaPp4tOblAzku49UilHmv6bG9A1y+4=";
   };
 
+  # The upstream Makefile hardcodes clang++, which is the default compiler on
+  # Darwin but not on Linux. Use the stdenv compiler so it builds everywhere.
+  postPatch = ''
+    substituteInPlace Makefile --replace-fail "clang++" "c++"
+  '';
+
+  nativeBuildInputs = [ installShellFiles ];
+
   installPhase = ''
     runHook preInstall
 
-    install -Dm755 pacman $out/bin/pacman
+    installBin pacman
 
     runHook postInstall
   '';
@@ -27,7 +38,7 @@ stdenv.mkDerivation (finalAttrs: {
     description = "Command line pacman game";
     homepage = "https://github.com/justinjo/Pacman";
     license = lib.licenses.unlicense;
-    platforms = lib.platforms.darwin;
+    platforms = lib.platforms.unix;
     maintainers = with lib.maintainers; [ ethancedwards8 ];
     mainProgram = "pacman";
   };