From d4971edd52aba83f202d0473df6643fec13aa0e4 Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Mon, 21 Jun 2021 14:12:42 +0200
Subject: [PATCH] python3Packages.psycopg2: disable when python<3.6, update
 license

---
 .../python-modules/psycopg2/default.nix       | 27 ++++++++++++++-----
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/pkgs/development/python-modules/psycopg2/default.nix b/pkgs/development/python-modules/psycopg2/default.nix
index b6e5ca4b389d..1af8fd38bad8 100644
--- a/pkgs/development/python-modules/psycopg2/default.nix
+++ b/pkgs/development/python-modules/psycopg2/default.nix
@@ -1,4 +1,12 @@
-{ stdenv, lib, buildPythonPackage, isPyPy, fetchPypi, postgresql, openssl }:
+{ stdenv
+, lib
+, buildPythonPackage
+, pythonOlder
+, isPyPy
+, fetchPypi
+, postgresql
+, openssl
+}:
 
 buildPythonPackage rec {
   pname = "psycopg2";
@@ -6,20 +14,27 @@ buildPythonPackage rec {
 
   # Extension modules don't work well with PyPy. Use psycopg2cffi instead.
   # c.f. https://github.com/NixOS/nixpkgs/pull/104151#issuecomment-729750892
-  disabled = isPyPy;
+  disabled = pythonOlder "3.6" || isPyPy;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "de5303a6f1d0a7a34b9d40e4d3bef684ccc44a49bbe3eb85e3c0bffb4a131b7c";
+    sha256 = "0z0v2d5gpgy0wf2ypqxv955c9k44yszd7r20km5s79yhy6k06lyy";
   };
 
-  buildInputs = lib.optional stdenv.isDarwin openssl;
-  nativeBuildInputs = [ postgresql ];
+  nativeBuildInputs = [
+    postgresql
+  ];
 
+  buildInputs = lib.optionals stdenv.isDarwin [
+    openssl
+  ];
+
+  # requires setting up a postgresql database
   doCheck = false;
 
   meta = with lib; {
     description = "PostgreSQL database adapter for the Python programming language";
-    license = with licenses; [ gpl2 zpl20 ];
+    homepage = "https://www.psycopg.org";
+    license = with licenses; [ lgpl3 zpl20 ];
   };
 }