default_pre_build &&
cd "$SOURCE_DIRECTORY" &&
message "${MESSAGE_COLOR}Hack build for new cython (remove on update to lxml 5.x).${DEFAULT_COLOR}" &&
patch -p0 <<EOT
--- setupinfo.py.orig  2023-11-11 11:01:30.149082879 +0000
+++ setupinfo.py       2023-11-11 11:04:02.318068772 +0000
@@ -150,7 +150,9 @@
     }
     if OPTION_WITH_COVERAGE:
         cythonize_directives['linetrace'] = True
-
+    # cython 3 pukes about exception stuff, adding legacy hack
+    # https://github.com/openai/mujoco-py/issues/773#issuecomment-1712434247
+    cythonize_directives['legacy_implicit_noexcept'] = True
     result = []
     for module, src_file in zip(modules, module_files):
         is_py = module in COMPILED_MODULES
EOT