diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2a961dd1ce00..dfacf2099265 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16522,7 +16522,7 @@ with pkgs;
   curaengine = callPackage ../applications/misc/curaengine {
     inherit (python3.pkgs) libarcus;
   };
-  cura = qt5.callPackage ../applications/misc/cura { };
+  cura = qt56.callPackage ../applications/misc/cura { };
 
   curaLulzbot = callPackage ../applications/misc/cura/lulzbot.nix { };
 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b27147e18b50..c73ca736a978 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -256,6 +256,10 @@ in {
     pythonPackages = self;
   };
 
+  pyqt56 = pkgs.libsForQt56.callPackage ../development/python-modules/pyqt/5.x.nix {
+    pythonPackages = self;
+  };
+
   pyqt5 = pkgs.libsForQt5.callPackage ../development/python-modules/pyqt/5.x.nix {
     pythonPackages = self;
   };
@@ -26536,7 +26540,10 @@ EOF
 
   twilio = callPackage ../development/python-modules/twilio { };
 
-  uranium = callPackage ../development/python-modules/uranium { };
+  uranium = callPackage ../development/python-modules/uranium {
+    # https://github.com/Ultimaker/Cura/issues/2596
+    pyqt5 = self.pyqt56;
+  };
 
   vine = callPackage ../development/python-modules/vine { };