From 17dfdc2f3629c737967516986e7d7f96ed94cebc Mon Sep 17 00:00:00 2001
From: Antony Lewis <antony@cosmologist.info>
Date: Mon, 13 Feb 2023 14:24:40 +0000
Subject: [PATCH] require packaging

---
 requirements.txt | 1 +
 setup.py         | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/requirements.txt b/requirements.txt
index d40bead..f8aeba0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ numpy>=1.17.0
 matplotlib>=2.2.0,!=3.5.0
 scipy>=1.5.0
 PyYAML>=5.1
+packaging
diff --git a/setup.py b/setup.py
index 81c18f0..36aab12 100644
--- a/setup.py
+++ b/setup.py
@@ -138,7 +138,8 @@ def run(self):
           'numpy (>=1.17.0)',
           'matplotlib (>=2.2.0,!=3.5.0)',
           'scipy (>=1.5.0)',
-          'PyYAML (>=5.1)'],
+          'PyYAML (>=5.1)',
+          'packaging'],
       # PySide is needed for the GUI
       extras_require={'GUI': ["PySide6>=6.10"]},
       cmdclass=cmd_class,