Suppress pip compile without cache tag

Author: zooba

Lib/ensurepip/__init__.py

@@ -177,6 +177,8 @@ def _bootstrap(*, root=None, upgrade=False, user=False,
             args += ["--user"]
         if verbosity:
             args += ["-" + "v" * verbosity]
+        if sys.implementation.cache_tag is None:
+            args += ["--no-compile"]
 
         return _run_pip([*args, "pip"], [os.fsdecode(tmp_wheel_path)])
 

Misc/NEWS.d/next/Build/2026-01-27-23-39-26.gh-issue-144278.tejFwL.rst

@@ -1,4 +1,4 @@
-Enables patching in a ``_PY_DISABLE_SYS_CACHE_TAG`` preprocessor definition
-when building to force :attr:`sys.implementation.cache_tag` to ``None``.
-This has the effect of completely disabling automatic creation and reading
-of ``.pyc`` files.
+Enables patching the ``TAG`` preprocessor definition to override
+:attr:`sys.implementation.cache_tag` at build time. Setting it to ``NULL``
+has the effect of completely disabling automatic creation and use of
+``.pyc`` files.