diff --git a/python-ini2toml.changes b/python-ini2toml.changes
index 29c2cc5..76d1439 100644
--- a/python-ini2toml.changes
+++ b/python-ini2toml.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Thu Aug 21 08:40:47 UTC 2025 - Markéta Machová <mmachova@suse.com>
+
+- Convert to libalternatives on SLE-16-based and newer systems only
+
+-------------------------------------------------------------------
+Wed May 28 12:27:02 UTC 2025 - Markéta Machová <mmachova@suse.com>
+
+- Convert to pip-based build and libalternatives
+
 -------------------------------------------------------------------
 Tue May 14 19:03:10 UTC 2024 - Dirk Müller <dmueller@suse.com>
 
diff --git a/python-ini2toml.spec b/python-ini2toml.spec
index ede51ce..d17459d 100644
--- a/python-ini2toml.spec
+++ b/python-ini2toml.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-ini2toml
 #
-# Copyright (c) 2024 SUSE LLC
+# Copyright (c) 2025 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -26,7 +26,6 @@
 %define psuffix %{nil}
 %bcond_with test
 %endif
-
 %bcond_with ringdisabled
 #              | Ring1 | Factory |
 # ringdisabled |   x   |         |
@@ -39,6 +38,7 @@
 %if 0%{?suse_version} == 1500 && 0%{?sle_version} >= 150400
 %bcond_without ringdisabled
 %endif
+%bcond_with experimental
 %if %{with ringdisabled}
 %bcond_with full
 %bcond_with all
@@ -46,9 +46,11 @@
 %bcond_without full
 %bcond_without all
 %endif
-%bcond_with experimental
-
-%define skip_python2 1
+%if 0%{?suse_version} > 1500
+%bcond_without libalternatives
+%else
+%bcond_with libalternatives
+%endif
 Name:           python-ini2toml%{psuffix}
 Version:        0.15
 Release:        0
@@ -56,12 +58,21 @@ Summary:        Automatic conversion of .ini/cfg files to TOML equivalents
 License:        MPL-2.0
 URL:            https://github.com/abravalheri/ini2toml/
 Source:         https://files.pythonhosted.org/packages/source/i/ini2toml/ini2toml-%{version}.tar.gz
+BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module setuptools_scm}
 BuildRequires:  %{python_module setuptools}
+BuildRequires:  %{python_module wheel}
+BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 Requires:       python-packaging >= 20.7
+BuildArch:      noarch
+%if %{with libalternatives}
+BuildRequires:  alts
+Requires:       alts
+%else
 Requires(post): update-alternatives
 Requires(postun): update-alternatives
+%endif
 %if %{with test}
 BuildRequires:  %{python_module packaging >= 20.7}
 BuildRequires:  %{python_module pytest}
@@ -75,17 +86,13 @@ BuildRequires:  %{python_module ini2toml-full = %{version}}
 %if %{with all}
 BuildRequires:  %{python_module ini2toml-all = %{version}}
 %endif
-
 %if %{with full} || %{with all}
 BuildRequires:  %{python_module ConfigUpdater}
 %endif
-
 %if %{with experimental}
 BuildRequires:  %{python_module ini2toml-experimental = %{version}}
 %endif
 %endif
-BuildRequires:  fdupes
-BuildArch:      noarch
 %python_subpackages
 
 %description
@@ -146,10 +153,10 @@ sed -i 's/--cov ini2toml --cov-report term-missing//' setup.cfg
 
 %if !%{with test}
 %build
-%python_build
+%pyproject_wheel
 
 %install
-%python_install
+%pyproject_install
 %python_clone -a %{buildroot}%{_bindir}/ini2toml
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 %endif
@@ -186,6 +193,9 @@ donttest=(-k "not test_auto_formatting")
 %postun
 %python_uninstall_alternative ini2toml
 
+%pre
+%python_libalternatives_reset_alternative ini2toml
+
 %if !%{with test}
 %files %{python_files}
 %doc AUTHORS.rst CHANGELOG.rst README.rst