From da24df963e14eec93c695eb55ec25796ba2ef4df Mon Sep 17 00:00:00 2001
From: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Date: Mon, 10 Dec 2018 13:31:47 -0500
Subject: [PATCH] pythonPackages.pyjet: fix for python37

---
 pkgs/development/python-modules/pyjet/default.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/pyjet/default.nix b/pkgs/development/python-modules/pyjet/default.nix
index 69d20863a772..ca9492cb9485 100644
--- a/pkgs/development/python-modules/pyjet/default.nix
+++ b/pkgs/development/python-modules/pyjet/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, nose, numpy }:
+{ lib, buildPythonPackage, fetchPypi, cython, nose, numpy }:
 
 buildPythonPackage rec {
   pname = "pyjet";
@@ -9,6 +9,15 @@ buildPythonPackage rec {
     sha256 = "1glcwv9ni8i40smfw6m456xjadlkackim5nk33xmas1fa96lpagg";
   };
 
+  # fix for python37
+  # https://github.com/scikit-hep/pyjet/issues/8
+  nativeBuildInputs = [ cython ];
+  preBuild = ''
+    for f in pyjet/src/*.{pyx,pxd}; do
+      cython --cplus "$f"
+    done
+  '';
+
   propagatedBuildInputs = [ numpy ];
   checkInputs = [ nose ];