diff --git a/python-base58.changes b/python-base58.changes
index 0c2d511..457c5ae 100644
--- a/python-base58.changes
+++ b/python-base58.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Jun  4 15:14:58 UTC 2025 - Felix Stegmeier <felix.stegmeier@suse.com>
+
+- fix usage of libalternatives
+
 -------------------------------------------------------------------
 Tue May 13 16:15:11 UTC 2025 - Markéta Machová <mmachova@suse.com>
 
diff --git a/python-base58.spec b/python-base58.spec
index 15a27f3..e2a3002 100644
--- a/python-base58.spec
+++ b/python-base58.spec
@@ -16,6 +16,7 @@
 #
 
 
+%bcond_without libalternatives
 %define skip_python2 1
 %{?!python_module:%define python_module() python-%{**} python3-%{**}}
 Name:           python-base58
@@ -32,10 +33,10 @@ BuildRequires:  %{python_module pytest >= 4.6}
 BuildRequires:  %{python_module pytest-benchmark}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  %{python_module wheel}
+BuildRequires:  alts
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
-Requires(post): alts
-Requires(postun): alts
+Requires:       alts
 BuildArch:      noarch
 %python_subpackages
 
@@ -56,11 +57,9 @@ Base58 and Base58Check implementation compatible with what is used by the bitcoi
 %check
 %pytest
 
-%post
-%python_install_alternative base58
-
-%postun
-%python_uninstall_alternative base58
+%pre
+# Removing old update-alternatives entries.
+%python_libalternatives_reset_alternative base58
 
 %files %{python_files}
 %doc README.md