diff --git a/pkgs/development/python-modules/xapp/default.nix b/pkgs/development/python-modules/xapp/default.nix
index ba55391ca66f..631857b89d5b 100644
--- a/pkgs/development/python-modules/xapp/default.nix
+++ b/pkgs/development/python-modules/xapp/default.nix
@@ -16,7 +16,7 @@
 
 buildPythonPackage rec {
   pname = "xapp";
-  version = "2.4.1";
+  version = "2.4.2";
 
   format = "other";
 
@@ -24,7 +24,7 @@ buildPythonPackage rec {
     owner = "linuxmint";
     repo = "python-xapp";
     rev = version;
-    hash = "sha256-Kvhp+biZ+KK9FYma/8cUEaQCHPKMLjOO909kbyMLQ3o=";
+    hash = "sha256-Gbm4YT9ZyrROOAbKz5xYd9J9YG9cUL2Oo6dDCPciaBs=";
   };
 
   nativeBuildInputs = [
@@ -42,14 +42,8 @@ buildPythonPackage rec {
   ];
 
   postPatch = ''
-    substituteInPlace "xapp/os.py" --replace "/usr/bin/pkexec" "${polkit}/bin/pkexec"
-  '';
-
-  postInstall = ''
-    # This is typically set by pipInstallHook/eggInstallHook,
-    # so we have to do so manually when using meson.
-    # https://github.com/NixOS/nixpkgs/issues/175227
-    export PYTHONPATH=$out/${python.sitePackages}:$PYTHONPATH
+    substituteInPlace "xapp/os.py" \
+      --replace-fail "/usr/bin/pkexec" "${polkit}/bin/pkexec"
   '';
 
   doCheck = false;
@@ -63,7 +57,7 @@ buildPythonPackage rec {
   meta = with lib; {
     homepage = "https://github.com/linuxmint/python-xapp";
     description = "Cross-desktop libraries and common resources for python";
-    license = licenses.lgpl2;
+    license = licenses.lgpl2Plus;
     platforms = platforms.linux;
     maintainers = teams.cinnamon.members;
   };