diff --git a/numexpr-2.8.4.tar.gz b/numexpr-2.8.4.tar.gz
new file mode 100644
index 0000000..6df58e6
--- /dev/null
+++ b/numexpr-2.8.4.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d5432537418d18691b9115d615d6daa17ee8275baef3edf1afbbf8bc69806147
+size 98719
diff --git a/numexpr-2.8.5.tar.gz b/numexpr-2.8.5.tar.gz
deleted file mode 100644
index 370efe9..0000000
--- a/numexpr-2.8.5.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:45ed41e55a0abcecf3d711481e12a5fb7a904fe99d42bc282a17cc5f8ea510be
-size 101666
diff --git a/python-numexpr.changes b/python-numexpr.changes
index 2f32312..747eb03 100644
--- a/python-numexpr.changes
+++ b/python-numexpr.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Mon Sep  4 19:07:09 UTC 2023 - Ben Greiner <code@bnavigator.de>
+
+- Revert to version 2.8.4: Patch release breaks its API and thus
+  Pandas -- gh#pydata/numexpr#442, gh#pydata/numexpr#444
+- Move to PEP517 build
+
 -------------------------------------------------------------------
 Sun Aug 27 21:31:12 UTC 2023 - Arun Persaud <arun@gmx.de>
 
diff --git a/python-numexpr.spec b/python-numexpr.spec
index 352ca50..679c4df 100644
--- a/python-numexpr.spec
+++ b/python-numexpr.spec
@@ -17,7 +17,7 @@
 
 
 Name:           python-numexpr
-Version:        2.8.5
+Version:        2.8.4
 Release:        0
 Summary:        Numerical expression evaluator for NumPy
 License:        MIT
@@ -26,7 +26,9 @@ URL:            https://github.com/pydata/numexpr/
 Source:         https://files.pythonhosted.org/packages/source/n/numexpr/numexpr-%{version}.tar.gz
 BuildRequires:  %{python_module devel >= 3.7}
 BuildRequires:  %{python_module numpy-devel >= 1.13.3}
+BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module setuptools}
+BuildRequires:  %{python_module wheel}
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++
 BuildRequires:  python-rpm-macros
@@ -48,10 +50,10 @@ sed -i '/^#!/ d' numexpr/cpuinfo.py
 
 %build
 export CFLAGS="%{optflags} -fno-strict-aliasing"
-%python_build
+%pyproject_wheel
 
 %install
-%python_install
+%pyproject_install
 %python_expand %fdupes %{buildroot}%{$python_sitearch}
 
 %check
@@ -65,7 +67,7 @@ popd
 %files %{python_files}
 %doc ANNOUNCE.rst AUTHORS.txt README.rst RELEASE_NOTES.rst site.cfg.example
 %license LICENSE.txt
-%{python_sitearch}/numexpr/
-%{python_sitearch}/numexpr-%{version}-py*.egg-info
+%{python_sitearch}/numexpr
+%{python_sitearch}/numexpr-%{version}.dist-info
 
 %changelog