From f06e90837263fcf9bf716b4fa2eda7696540f63e Mon Sep 17 00:00:00 2001
From: Armeen Mahdian <mahdianarmeen@gmail.com>
Date: Sat, 19 Mar 2022 17:25:26 -0500
Subject: [PATCH] docopt_cpp: patch to support python3 for running tests

https://github.com/docopt/docopt.cpp/pull/145/commits/b3d909dc952ab102a4ad5a1541a41736f35b92ba
---
 pkgs/development/libraries/docopt_cpp/default.nix | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/docopt_cpp/default.nix b/pkgs/development/libraries/docopt_cpp/default.nix
index 3de84b684e52..4fae1db9ba3c 100644
--- a/pkgs/development/libraries/docopt_cpp/default.nix
+++ b/pkgs/development/libraries/docopt_cpp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, python2 }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, cmake, python3 }:
 
 stdenv.mkDerivation rec {
   version = "0.6.3";
@@ -11,7 +11,15 @@ stdenv.mkDerivation rec {
     sha256 = "0cz3vv7g5snfbsqcf3q8bmd6kv5qp84gj3avwkn4vl00krw13bl7";
   };
 
-  nativeBuildInputs = [ cmake python2 ];
+  patches = [
+    (fetchpatch {
+      name = "python3-for-tests";
+      url = "https://github.com/docopt/docopt.cpp/commit/b3d909dc952ab102a4ad5a1541a41736f35b92ba.patch";
+      hash = "sha256-JJR09pbn3QhYaZAIAjs+pe28+g1VfgHUKspWorHzr8o=";
+    })
+  ];
+
+  nativeBuildInputs = [ cmake python3 ];
 
   cmakeFlags = ["-DWITH_TESTS=ON"];