Fix 1.21.4 texture pack

build.py

@@ -4,6 +4,7 @@ import tempfile
 import hashlib
 import time
 import zipfile
+import importlib.util
 
 current_dir = os.getcwd()
 
@@ -23,6 +24,18 @@ def buildPack(dir, version):
     current_path = os.path.join(current_dir, str(version))
     copyFiles(current_path, dir)
 
+    buildScript = os.path.join(dir, "build.py")
+    if (os.path.isfile(buildScript)):
+        old_cwd = os.getcwd()
+        os.chdir(dir)
+
+        spec = importlib.util.spec_from_file_location('dynamic_module', buildScript)
+        module = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(module)
+
+        os.chdir(old_cwd)
+        os.remove(buildScript)
+
     zip_folder(dir, current_path + ".zip")
     # shutil.make_archive(current_path, "zip", dir)
     current_path = current_path + ".zip"