python.pkgs.kiwisolver: fix build

pkgs/development/python-modules/kiwisolver/1_1.nix

@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, stdenv
+, libcxx
+}:
+
+buildPythonPackage rec {
+  pname = "kiwisolver";
+  version = "1.1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "53eaed412477c836e1b9522c19858a8557d6e595077830146182225613b11a75";
+  };
+
+  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
+
+  # Does not include tests
+  doCheck = false;
+
+  meta = {
+    description = "A fast implementation of the Cassowary constraint solver";
+    homepage = "https://github.com/nucleic/kiwi";
+    license = lib.licenses.bsd3;
+  };
+
+}

pkgs/development/python-modules/kiwisolver/default.nix

@@ -3,6 +3,7 @@
 , fetchPypi
 , stdenv
 , libcxx
+, cppy
 }:
 
 buildPythonPackage rec {
@@ -16,6 +17,10 @@ buildPythonPackage rec {
   
   NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin "-I${libcxx}/include/c++/v1";
   
+  nativeBuildInputs = [
+    cppy
+  ];
+
   # Does not include tests
   doCheck = false;