From c94913045f12d52d3514a05a5eedbfe14fb345f5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Josef=20Kemetm=C3=BCller?= <josef.kemetmueller@gmail.com>
Date: Wed, 12 May 2021 21:02:50 +0200
Subject: [PATCH] python37.pkgs.prettytable: Fix build

---
 pkgs/development/python-modules/prettytable/default.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/prettytable/default.nix b/pkgs/development/python-modules/prettytable/default.nix
index d349a58960a..50b9eb57630 100644
--- a/pkgs/development/python-modules/prettytable/default.nix
+++ b/pkgs/development/python-modules/prettytable/default.nix
@@ -4,6 +4,8 @@
 , glibcLocales
 , setuptools_scm
 , wcwidth
+, importlib-metadata
+, pythonOlder
 }:
 
 buildPythonPackage rec {
@@ -18,7 +20,11 @@ buildPythonPackage rec {
   nativeBuildInputs = [ setuptools_scm ];
   buildInputs = [ glibcLocales ];
 
-  propagatedBuildInputs = [ wcwidth ];
+  propagatedBuildInputs = [
+    wcwidth
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+  ];
 
   preCheck = ''
     export LANG="en_US.UTF-8"