From 6d565c8b698c30571c02041b5d12113a806427d3 Mon Sep 17 00:00:00 2001
From: Jonathan Ringer <jonringer117@gmail.com>
Date: Sat, 29 Aug 2020 11:53:11 -0700
Subject: [PATCH] python3Packages.cirq: fix build

---
 pkgs/development/python-modules/cirq/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/python-modules/cirq/default.nix b/pkgs/development/python-modules/cirq/default.nix
index 83fc0d371c1d..72a2edeab12a 100644
--- a/pkgs/development/python-modules/cirq/default.nix
+++ b/pkgs/development/python-modules/cirq/default.nix
@@ -48,6 +48,11 @@ buildPythonPackage rec {
     })
   ];
 
+  postPatch = ''
+    substituteInPlace requirements.txt \
+      --replace "protobuf~=3.12.0" "protobuf~=3.12"
+  '';
+
   propagatedBuildInputs = [
     freezegun
     google_api_core