diff --git a/m.py b/m.py
index 0e76645..319dae3 100755
--- a/m.py
+++ b/m.py
@@ -12,7 +12,7 @@ import subprocess
 import os
 
 
-from typing import (Optional, Any,)
+from typing import (Optional, Any, TypeAlias, Literal, cast,)
 
 logger = logging.getLogger()
 
@@ -138,6 +138,17 @@ def inside_env() -> bool:
     except Exception:
         return False
 
+#class Commands(enum.StrEnum):
+#    js = 'js'
+#    mypy = 'mypy'
+#    env = 'env'
+#    ruff = 'ruff'
+#    m2 = 'm2'
+
+Command_args = ['js', 'mypy', 'env', 'ruff', 'm2']
+
+Command : TypeAlias = Literal['js', 'mypy', 'env', 'ruff', 'm2']
+
 def run(argv: Optional[list[str]] = None) -> None:
     logging.basicConfig(
         level=logging.INFO,
@@ -152,43 +163,41 @@ def run(argv: Optional[list[str]] = None) -> None:
     if argv is None:
         argv = sys.argv[1:]
 
-    class Commands(enum.StrEnum):
-        js = 'js'
-        mypy = 'mypy'
-        env = 'env'
-        ruff = 'ruff'
-        m2 = 'm2'
 
     parser = argparse.ArgumentParser()
     parser.add_argument(
-        #'command',
-        '_command',
+        'command',
+        #'_command',
         choices=[
-            o.value
-            for o in Commands
+            o
+            for o in Command_args
         ],
         #required=True,
     )
 
     options, args = parser.parse_known_args(argv)
 
-    options.command = Commands(options._command)
+    assert options.command in cast(list[str], Command_args)
 
-    if options.command is Commands.js:
+    #options.command = Commands(options._command)
+
+    if options.command == 'js':
         js(args)
-    elif options.command is Commands.env:
+    elif options.command == 'env':
         env(args)
-    elif options.command is Commands.mypy:
+    elif options.command == 'mypy':
         mypy(args)
-    elif options.command is Commands.ruff:
+    elif options.command == 'ruff':
         ruff(args)
-    elif options.command is Commands.m2:
+    elif options.command == 'm2':
         if not inside_env():
             env(['--', 'm.py', 'm2', *args])
             return
 
         import python.tasks.cython
-        python.tasks.cython.mypyc_build(pathlib.Path('m.py'))
+        python.tasks.cython.mypyc_build(
+            pathlib.Path('m.py')
+        )
     else:
         raise NotImplementedError
 
diff --git a/python/stubs/Cython/Build/__init__.pyi b/python/stubs/Cython/Build/__init__.pyi
index 1d582a5..e2604e9 100644
--- a/python/stubs/Cython/Build/__init__.pyi
+++ b/python/stubs/Cython/Build/__init__.pyi
@@ -14,4 +14,4 @@ def cythonize(
     #exclude_failures=False,
     #show_all_warnings=False,
     #**options
-) -> setuptools.extension.Extension: ...
+) -> list[setuptools.extension.Extension]: ...
diff --git a/python/stubs/distutils/command/__init__.pyi b/python/stubs/distutils/command/__init__.pyi
index 04e7218..c75d7ec 100644
--- a/python/stubs/distutils/command/__init__.pyi
+++ b/python/stubs/distutils/command/__init__.pyi
@@ -3,8 +3,10 @@ import pathlib
 
 class build_ext:
     extensions : list[setuptools.extension.Extension]
-    build_temp : pathlib.Path
-    build_lib: pathlib.Path
+    #build_temp : pathlib.Path
+    #build_lib: pathlib.Path
+    build_temp: str
+    build_lib: str
 
     def run(self) -> None:
         ...
diff --git a/python/tasks/cython.py b/python/tasks/cython.py
index b8f337d..fe61860 100644
--- a/python/tasks/cython.py
+++ b/python/tasks/cython.py
@@ -46,15 +46,16 @@ def build(content: str, module: M) -> M:
 
     if not output_dir.exists() or True:
         os.makedirs(str(output_dir), exist_ok=True)
+
         source_path = output_dir / ('_%s.pyx' % sha256sum)
         if not source_path.exists():
             with io.open(str(source_path), 'w') as f:
                 f.write(content)
 
         t1 = Cython.Build.Inline._get_build_extension()
-        t1.extensions = [Cython.Build.cythonize(str(source_path))]
-        t1.build_temp = pathlib.Path('/')
-        t1.build_lib = output_dir
+        t1.extensions = Cython.Build.cythonize(str(source_path))
+        t1.build_temp = str(pathlib.Path('/'))
+        t1.build_lib = str(output_dir)
         #t2 = Cython.Build.Inline.Extension(
         #    name=sha256sum,
         #)
@@ -135,8 +136,8 @@ def mypyc_build(file_path: pathlib.Path) -> Any:
             [str(source_path)],
             target_dir=str(output_dir / 'build')
         )
-        t1.build_temp = output_dir
-        t1.build_lib = lib_dir
+        t1.build_temp = str(output_dir)
+        t1.build_lib = str(lib_dir)
         #t2 = Cython.Build.Inline.Extension(
         #    name=sha256sum,
         #)