From d0ed0ee3399a109c2e7027f0c8c16f2b629fad9e Mon Sep 17 00:00:00 2001
From: Ben Wolsieffer <benwolsieffer@gmail.com>
Date: Thu, 8 Feb 2024 21:33:34 -0500
Subject: [PATCH] Override to use empy 3.3.4

Empy 4.0 has many breaking changes and is not supported by ROS.

Fixes: #340
---
 distros/distro-overlay.nix | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/distros/distro-overlay.nix b/distros/distro-overlay.nix
index 6f925b9049..f59b6cd785 100644
--- a/distros/distro-overlay.nix
+++ b/distros/distro-overlay.nix
@@ -2,8 +2,19 @@
 self: super:
 let
   pythonOverridesFor = with self.lib; prevPython: prevPython // {
-    pkgs = prevPython.pkgs.overrideScope (pyFinal: pyPrev: optionalAttrs pyPrev.isPy3k {
+    pkgs = prevPython.pkgs.overrideScope (pyFinal: pyPrev: {
       wxPython = pyFinal.wxPython_4_2;
+
+      # ROS is not compatible with empy 4
+      empy = pyPrev.empy.overrideAttrs ({
+        pname, ...
+      }: rec {
+        version = "3.3.4";
+        src = pyFinal.fetchPypi {
+          inherit pname version;
+          hash = "sha256-c6xJeFtgFHnfTqGKfHm8EwSop8NMArlHLPEgauiPAbM=";
+        };
+      });
     });
   };