From f20a66084fde224cc06451c7f8aa6d3f2a42859c Mon Sep 17 00:00:00 2001
From: Pierre Bourdon <delroth@gmail.com>
Date: Sun, 3 Mar 2019 05:03:13 +0100
Subject: [PATCH] pythonPackages.protobuf: propagate native pkgs.protobuf input

Python packages depending on the protobuf library often use the "protoc"
tool from pkgs.protobuf to codegen at build time.

This fixes a few regressions from 5c7531872fb55f42b03df9929f60cfb410cf7cc5
---
 pkgs/development/python-modules/protobuf/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/protobuf/default.nix b/pkgs/development/python-modules/protobuf/default.nix
index bfccdabd759..4f00537db0c 100644
--- a/pkgs/development/python-modules/protobuf/default.nix
+++ b/pkgs/development/python-modules/protobuf/default.nix
@@ -14,7 +14,8 @@ buildPythonPackage rec {
     ++ optional (versionOlder protobuf.version "2.7.0") "-std=c++98";
 
   propagatedBuildInputs = [ google_apputils ];
-  nativeBuildInputs = [ google_apputils pyext protobuf ];
+  propagatedNativeBuildInputs = [ protobuf ];  # For protoc.
+  nativeBuildInputs = [ google_apputils pyext ];
   buildInputs = [ protobuf ];
 
   patches = optional isPy37