I will murder someone for this

build.zig

@@ -24,6 +24,45 @@ fn addEngineSources(c: *std.Build.Step.Compile) void {
     });
 }
 
+const LuaVersion = enum {
+    lua52,
+    lua53,
+    lua54,
+};
+
+// For the test architecture, we specify the target Lua version we so desire.
+// This can be checked for with Lua's _VERSION
+
+fn compileTheRightLua(b: *std.Build, c: *std.Build.Step.Compile, version: LuaVersion) !void {
+    const alloc = b.allocator;
+    const dirName = @tagName(version);
+
+    const rootPath = try std.mem.join(alloc, std.fs.path.sep_str, &.{"foreign", dirName});
+
+    c.addIncludePath(b.path(rootPath));
+
+    // get all the .c files
+    var files = std.ArrayList([]const u8).init(alloc);
+    errdefer files.deinit();
+
+    var dir = try std.fs.cwd().openDir(rootPath, std.fs.Dir.OpenDirOptions {.iterate = true});
+    defer dir.close();
+
+    var iter = dir.iterate();
+
+    while(try iter.next()) |e| {
+        if(std.mem.startsWith(u8, e.name, "l") and std.mem.endsWith(u8, e.name, ".c") and !std.mem.eql(u8, e.name, "lua.c")) {
+            const name = try alloc.dupe(u8, e.name);
+            try files.append(name);
+        }
+    }
+
+    c.addCSourceFiles(.{
+        .root = b.path(rootPath),
+        .files = files.items,
+    });
+}
+
 pub fn build(b: *std.Build) void {
     const os = builtin.target.os.tag;
 
@@ -72,21 +111,19 @@ pub fn build(b: *std.Build) void {
     if (os == .windows) {
         // use the msvc win64 dll versions and copy them to raylib/ and lua/
         // get raylib from https://github.com/raysan5/raylib/releases
-        // get lua from https://luabinaries.sourceforge.net/
-        emulator.addIncludePath(b.path("lua/include"));
         emulator.addIncludePath(b.path("raylib/include"));
-        emulator.addObjectFile(b.path("lua/lua54.lib"));
         emulator.addObjectFile(b.path("raylib/lib/raylibdll.lib"));
     } else {
-        emulator.linkSystemLibrary("lua");
         emulator.linkSystemLibrary("raylib");
     }
+    const luaVer = b.option(LuaVersion, "lua", "The version of Lua to use.") orelse LuaVersion.lua54;
     emulator.addCSourceFiles(.{
         .files = &.{
             "src/testLuaArch.c",
             "src/emulator.c",
         },
     });
+    compileTheRightLua(b, emulator, luaVer) catch unreachable;
 
     // forces us to link in everything too
     emulator.linkLibrary(engineStatic);