python3Packages.pysearpc: use correct Python version

pkgs/development/libraries/libsearpc/default.nix

@@ -1,5 +1,12 @@
-{ lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config, python3Packages
-, glib, jansson }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoreconfHook
+, pkg-config
+, python3
+, glib
+, jansson
+}:
 
 stdenv.mkDerivation rec {
   version = "3.2.0";
@@ -12,9 +19,19 @@ stdenv.mkDerivation rec {
     sha256 = "18i5zvrp6dv6vygxx5nc93mai2p2x786n5lnf5avrin6xiz2j6hd";
   };
 
-  nativeBuildInputs = [ autoreconfHook pkg-config ];
-  buildInputs = with python3Packages; [ python simplejson ];
-  propagatedBuildInputs = [ glib jansson ];
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+  ];
+
+  buildInputs = [
+    python3
+  ];
+
+  propagatedBuildInputs = [
+    glib
+    jansson
+  ];
 
   meta = with lib; {
     homepage = "https://github.com/haiwen/libsearpc";

pkgs/top-level/python-packages.nix

@@ -7321,7 +7321,9 @@ in {
 
   pysdl2 = callPackage ../development/python-modules/pysdl2 { };
 
-  pysearpc = toPythonModule pkgs.libsearpc;
+  pysearpc = toPythonModule (pkgs.libsearpc.override {
+    python3 = self.python;
+  });
 
   pysecuritas = callPackage ../development/python-modules/pysecuritas { };