Sólo en joblib-1.3.0/joblib/externals: cloudpickle
diff -ur joblib-1.3.0/joblib/externals/loky/backend/reduction.py joblib-1.3.0.cp/joblib/externals/loky/backend/reduction.py
--- joblib-1.3.0/joblib/externals/loky/backend/reduction.py	2023-06-28 10:33:35.000000000 +0200
+++ joblib-1.3.0.cp/joblib/externals/loky/backend/reduction.py	2023-07-08 21:06:55.947946288 +0200
@@ -80,7 +80,7 @@
 
 # global variable to change the pickler behavior
 try:
-    from joblib.externals import cloudpickle  # noqa: F401
+    import cloudpickle  # noqa: F401
 
     DEFAULT_ENV = "cloudpickle"
 except ImportError:
@@ -108,7 +108,7 @@
         return
 
     if loky_pickler == "cloudpickle":
-        from joblib.externals.cloudpickle import CloudPickler as loky_pickler_cls
+        from cloudpickle import CloudPickler as loky_pickler_cls
     else:
         try:
             from importlib import import_module
diff -ur joblib-1.3.0/joblib/externals/loky/cloudpickle_wrapper.py joblib-1.3.0.cp/joblib/externals/loky/cloudpickle_wrapper.py
--- joblib-1.3.0/joblib/externals/loky/cloudpickle_wrapper.py	2023-06-28 10:33:35.000000000 +0200
+++ joblib-1.3.0.cp/joblib/externals/loky/cloudpickle_wrapper.py	2023-07-08 21:07:13.773238192 +0200
@@ -1,6 +1,6 @@
 import inspect
 from functools import partial
-from joblib.externals.cloudpickle import dumps, loads
+from cloudpickle import dumps, loads
 
 
 WRAP_CACHE = {}
diff -ur joblib-1.3.0/pyproject.toml joblib-1.3.0.cp/pyproject.toml
--- joblib-1.3.0/pyproject.toml	2023-06-28 15:18:07.000000000 +0200
+++ joblib-1.3.0.cp/pyproject.toml	2023-07-08 21:03:37.166691073 +0200
@@ -27,6 +27,9 @@
 ]
 requires-python = ">=3.7"
 dynamic = ["version"]
+dependencies = [
+  "cloudpickle>=2.2.0",
+]
 
 [project.readme]
 file = "README.rst"
@@ -42,7 +45,6 @@
     "joblib.test",
     "joblib.test.data",
     "joblib.externals",
-    "joblib.externals.cloudpickle",
     "joblib.externals.loky",
     "joblib.externals.loky.backend",
 ]