python
@@ -59,4 +59,5 @@ jobs:
           cache: pip
           cache-dependency-path: Tools/requirements-dev.txt
       - run: pip install -r Tools/requirements-dev.txt
+      - run: python3 Misc/mypy/make_symlinks.py
       - run: mypy --config-file ${{ matrix.target }}/mypy.ini
@@ -3206,6 +3206,7 @@ distclean: clobber docclean
 		Modules/ld_so_aix Modules/python.exp Misc/python.pc \
 		Misc/python-embed.pc Misc/python-config.sh
 	-rm -f python*-gdb.py
+	-find Misc/mypy -type l -delete
 	# Issue #28258: set LC_ALL to avoid issues with Estonian locale.
 	# Expansion is performed here by shell (spawned by make) itself before
 	# arguments are passed to find. So LC_ALL=C must be set as a separate

diff --git a/Misc/mypy/.gitignore b/Misc/mypy/.gitignore
@@ -0,0 +1,5 @@
+# This list is also used in make_symlinks.py, only put actual concrete paths below
+# (no wildcards!).
+
+_colorize.py
+_pyrepl
diff --git a/Misc/mypy/README.md b/Misc/mypy/README.md
@@ -11,6 +11,17 @@ like `types`, `typing`, and `collections.abc`.
 
 So instead, we set `mypy_path` to include this directory,
 which only links modules and packages we know are safe to be
-type-checked themselves and used as dependencies.
+type-checked themselves and used as dependencies.  See
+`Lib/_pyrepl/mypy.ini` for an example.
 
-See `Lib/_pyrepl/mypy.ini` for an example.
+At the same time, we don't want symlinks to be checked into the
+repository as they would end up being shipped as part of the source
+tarballs, which can create compatibility issues with unpacking on
+operating systems without symlink support.  Additionally, those symlinks
+would have to be part of the SBOM, which we don't want either.
+
+Instead, this directory ships with a `make_symlinks.py` script, which
+creates the symlinks when they are needed.  This happens automatically
+on GitHub Actions.  You will have to run it manually for a local
+type-checking workflow.  Note that `make distclean` removes the symlinks
+to ensure that the produced distribution is clean.
diff --git a/Misc/mypy/_colorize.py b/Misc/mypy/_colorize.py
diff --git a/Misc/mypy/_pyrepl b/Misc/mypy/_pyrepl
diff --git a/Misc/mypy/make_symlinks.py b/Misc/mypy/make_symlinks.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import os
+from pathlib import Path
+
+CURRENT_DIR = Path(__file__).parent
+MISC_DIR = CURRENT_DIR.parent
+REPO_ROOT = MISC_DIR.parent
+LIB_DIR = REPO_ROOT / "Lib"
+
+parser = argparse.ArgumentParser(prog="make_symlinks.py")
+parser.add_argument(
+    "--dry-run",
+    action="store_true",
+    help="Don't actually symlink or delete anything",
+)
+parser.add_argument(
+    "--force",
+    action="store_true",
+    help="Delete destination paths if they exist",
+)
+
+args = parser.parse_args()
+
+for link in (CURRENT_DIR / ".gitignore").read_text().splitlines():
+    link = link.strip()
+    if not link or link.startswith('#'):
+        continue
+
+    src = LIB_DIR / link
+    dst = CURRENT_DIR / link
+    src_at_root = src.relative_to(REPO_ROOT)
+    dst_at_root = dst.relative_to(REPO_ROOT)
+    if args.force:
+        if dst.exists():
+            if args.dry_run:
+                print(f"{dst_at_root} already exists, would delete")
+            else:
+                print(f"{dst_at_root} already exists, deleting")
+                dst.unlink()
+    elif (
+        dst.is_symlink()
+        and src.resolve(strict=True) == dst.resolve(strict=True)
+    ):
+        print(f"{dst_at_root} already exists, skipping")
+        continue
+
+    # we specifically want relative path links with ..
+    src_rel = os.path.relpath(src, CURRENT_DIR)
+    action = "symlinking" if not args.dry_run else "would symlink"
+    print(f"{action} {src_at_root} at {dst_at_root}")
+    if not args.dry_run:
+        os.symlink(src_rel, dst)