From 96a4eba4ce51308a4b47c9c060b9cccbb982bea8 Mon Sep 17 00:00:00 2001
From: Bernardo Meurer <bernardo@meurer.org>
Date: Wed, 18 Nov 2020 00:58:42 -0800
Subject: [PATCH] pythonPackages.psycopg2: document pypy incompatibility

---
 pkgs/development/python-modules/psycopg2/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/python-modules/psycopg2/default.nix b/pkgs/development/python-modules/psycopg2/default.nix
index 604431612a0..4e0a2771e9a 100644
--- a/pkgs/development/python-modules/psycopg2/default.nix
+++ b/pkgs/development/python-modules/psycopg2/default.nix
@@ -4,6 +4,8 @@ buildPythonPackage rec {
   pname = "psycopg2";
   version = "2.8.6";
 
+  # Extension modules don't work well with PyPy. Use psycopg2cffi instead.
+  # c.f. https://github.com/NixOS/nixpkgs/pull/104151#issuecomment-729750892
   disabled = isPyPy;
 
   src = fetchPypi {