From cce62f7b218b140eacf66469831875b1181dd1ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Mon, 28 Dec 2020 16:47:46 +0100
Subject: [PATCH] pythonPackages.pythonocc-core: Fix building on darwin

---
 .../python-modules/pythonocc-core/default.nix     | 15 +++++++++++----
 pkgs/top-level/python-packages.nix                |  6 ++++--
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/pkgs/development/python-modules/pythonocc-core/default.nix b/pkgs/development/python-modules/pythonocc-core/default.nix
index b3a9cfe82ee..96c79a45b27 100644
--- a/pkgs/development/python-modules/pythonocc-core/default.nix
+++ b/pkgs/development/python-modules/pythonocc-core/default.nix
@@ -1,5 +1,6 @@
-{ stdenv, python, fetchFromGitHub, cmake, swig, ninja,
-  opencascade, smesh, freetype, libGL, libGLU, libX11 }:
+{ stdenv, python, fetchFromGitHub, cmake, swig, ninja
+, opencascade, smesh, freetype, libGL, libGLU, libX11
+, Cocoa }:
 
 stdenv.mkDerivation rec {
   pname = "pythonocc-core";
@@ -12,11 +13,17 @@ stdenv.mkDerivation rec {
     sha256 = "1jk4y7f75z9lyawffpfkr50qw5452xzi1imcdlw9pdvf4i0y86k3";
   };
 
-  nativeBuildInputs = [ cmake swig ninja ];
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+    --replace "/usr/X11R6/lib/libGL.dylib" "${libGL}/lib/libGL.dylib" \
+    --replace "/usr/X11R6/lib/libGLU.dylib" "${libGLU}/lib/libGLU.dylib"
+  '';
+
+  nativeBuildInputs = [ cmake swig ];
   buildInputs = [
     python opencascade smesh
     freetype libGL libGLU libX11
-  ];
+  ] ++ stdenv.lib.optionals stdenv.isDarwin [ Cocoa ];
 
   cmakeFlags = [
     "-Wno-dev"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 0dd7d2ec227..ced9c4467e5 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6025,8 +6025,10 @@ in {
 
   python-oauth2 = callPackage ../development/python-modules/python-oauth2 { };
 
-  pythonocc-core =
-    toPythonModule (callPackage ../development/python-modules/pythonocc-core { inherit (pkgs.xorg) libX11; });
+  pythonocc-core = toPythonModule (callPackage ../development/python-modules/pythonocc-core {
+    inherit (pkgs.xorg) libX11;
+    inherit (pkgs.darwin.apple_sdk.frameworks) Cocoa;
+  });
 
   python-olm = callPackage ../development/python-modules/python-olm { };