python.pkgs.pyside2: bugfix

Building python.pkgs.pyside2 fails for python version older than 3.9,
due to crypt.h header issue related to older glibc (#202262).

The fix is to use libxrypto for these older python versions.

pkgs/development/python-modules/pyside2/default.nix

@@ -1,5 +1,13 @@
-{ python, fetchurl, lib, stdenv,
-  cmake, ninja, qt5, shiboken2 }:
+{ python
+, fetchurl
+, lib
+, stdenv
+, cmake
+, libxcrypt
+, ninja
+, qt5
+, shiboken2
+}:
 
 stdenv.mkDerivation rec {
   pname = "pyside2";
@@ -26,12 +34,29 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_COMPILE = "-I${qt5.qtdeclarative.dev}/include/QtQuick/${qt5.qtdeclarative.version}/QtQuick";
 
   nativeBuildInputs = [ cmake ninja qt5.qmake python ];
+
   buildInputs = (with qt5; [
-    qtbase qtxmlpatterns qtmultimedia qttools qtx11extras qtlocation qtscript
-    qtwebsockets qtwebengine qtwebchannel qtcharts qtsensors qtsvg
-  ]) ++ [
-    python.pkgs.setuptools
-  ];
+    qtbase
+    qtxmlpatterns
+    qtmultimedia
+    qttools
+    qtx11extras
+    qtlocation
+    qtscript
+    qtwebsockets
+    qtwebengine
+    qtwebchannel
+    qtcharts
+    qtsensors
+    qtsvg
+  ]) ++ (with python.pkgs; [
+    setuptools
+  ]) ++ (lib.optionals (python.pythonOlder "3.9") [
+    # see similar issue: 202262
+    # libxcrypt is required for crypt.h for building older python modules
+    libxcrypt
+  ]);
+
   propagatedBuildInputs = [ shiboken2 ];
 
   dontWrapQtApps = true;