diff --git a/README.rst b/README.rst
index 5b8b568..d3fd1d1 100644
--- a/README.rst
+++ b/README.rst
@@ -52,6 +52,13 @@ interpreter (and only the Python3 package installs scripts)::
 News
 ----
 
+ * 2024-07-03: **Version 0.11.0**. See the `download page
+   <https://pypi.python.org/pypi/stdeb/0.11.0>`__.
+
+  * Breaking changes:
+
+    * remove support for running stdeb using Python 2.
+
  * 2024-11-14: **Version 0.10.1**. See the `download page
    <https://pypi.python.org/pypi/stdeb/0.10.1>`__.
    This is the last planned release of stdeb which supports running stdeb
diff --git a/stdeb/util.py b/stdeb/util.py
index 26b656e..61b1343 100644
--- a/stdeb/util.py
+++ b/stdeb/util.py
@@ -26,10 +26,12 @@
            'apply_patch', 'repack_tarball_with_debianized_dirname',
            'expand_sdist_file', 'stdeb_cfg_options']
 
-DH_MIN_VERS = '9'  # Fundamental to stdeb >= 0.10
-DH_DEFAULT_VERS = 9
+DH_MIN_VERS = '12'  # Fundamental to stdeb >= 0.10
+DH_DEFAULT_VERS = 12
 
-PYTHON_ALL_MIN_VERS = '2.6.6-3'
+# Choose the oldest from Debian oldoldstable and currently supported Ubuntu LTS
+PYTHON_ALL_MIN_VERS = '2.7.16-1'
+PYTHON3_ALL_MIN_VERS = '3.7.3-1'
 
 try:
     # Python 2.x
@@ -1231,7 +1233,7 @@ def __init__(self,
 
             sequencer_options.append('--with python-virtualenv')
         else:
-            sequencer_options.append('--buildsystem=python_distutils')
+            sequencer_options.append('--buildsystem=pybuild')
             self.override_dh_virtualenv_py = ''
 
         if with_dh_systemd:
@@ -1560,6 +1562,14 @@ def build_dsc(debinfo,
             if len(python3_defaults_version_str) == 0:
                 log.warn('This version of stdeb requires python3-all, '
                          'but you do not have this package installed.')
+            else:
+                if not dpkg_compare_versions(
+                    python3_defaults_version_str, 'ge', PYTHON3_ALL_MIN_VERS
+                ):
+                    log.warn('This version of stdeb requires python-all >= '
+                             '%s. Use stdeb 0.6.0 or older to generate source '
+                             'packages that use python-support.' % (
+                                 PYTHON_ALL_MIN_VERS,))
 
     #    D. restore debianized tree
     os.rename(fullpath_repackaged_dirname+'.debianized',
@@ -1605,7 +1615,7 @@ def build_dsc(debinfo,
 %(uploaders)sSection: %(debian_section)s
 Priority: optional
 Build-Depends: %(build_depends)s
-Standards-Version: 3.9.1
+Standards-Version: 4.7.0
 %(source_stanza_extras)s
 
 %(control_py2_stanza)s