From 76a7064097dd9a3a339dcc1504d6d1f9fb37e8ad Mon Sep 17 00:00:00 2001
From: "Robert T. McGibbon" <rmcgibbo@gmail.com>
Date: Tue, 29 Dec 2020 15:47:53 -0500
Subject: [PATCH] python39Packages.imageio-ffmpeg: fix for python3.9

---
 .../python-modules/imageio-ffmpeg/default.nix            | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/imageio-ffmpeg/default.nix b/pkgs/development/python-modules/imageio-ffmpeg/default.nix
index d9991ee7845..db59ba70bb2 100644
--- a/pkgs/development/python-modules/imageio-ffmpeg/default.nix
+++ b/pkgs/development/python-modules/imageio-ffmpeg/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, fetchpatch
 , isPy3k
 }:
 
@@ -9,9 +10,15 @@ buildPythonPackage rec {
   version = "0.4.2";
 
   src = fetchPypi {
-    sha256 = "13b05b17a941a9f4a90b16910b1ffac159448cff051a153da8ba4b4343ffa195";
     inherit pname version;
+    sha256 = "13b05b17a941a9f4a90b16910b1ffac159448cff051a153da8ba4b4343ffa195";
   };
+  patches = [ (fetchpatch {
+    # Fixes compatibility with python3.9
+    # Should be included in the next release after 0.4.2
+    url = "https://github.com/imageio/imageio-ffmpeg/pull/43/commits/b90c39fe3d29418d67d953588ed9fdf4d848f811.patch";
+    sha256 = "0d9kf4w6ldwag3s2dr9zjin6wrj66fnl4fn8379ci4q4qfsqgx3f";
+  })];
 
   disabled = !isPy3k;