diff --git a/pkgs/applications/misc/cura/default.nix b/pkgs/applications/misc/cura/default.nix
index 10f6837761bb..3b00bba709a0 100644
--- a/pkgs/applications/misc/cura/default.nix
+++ b/pkgs/applications/misc/cura/default.nix
@@ -2,27 +2,30 @@
 
 mkDerivation rec {
   name = "cura-${version}";
-  version = "3.2.1";
+  version = "3.3.1";
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "Cura";
     rev = version;
-    sha256 = "0yaya0ww92qjm7g31q85m5f95nwdapldjx1kdf1ar4yzwh4r15rp";
+    sha256 = "0a2xxiw1h5cq4nd4pdkq757hap85p2i29msxs57kbfdd78izrjlx";
   };
 
   materials = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "fdm_materials";
-    rev = "3.2.1";
-    sha256 = "1kr9ga727x0kazw2ypac9bi6g6lddbsx80qw8fbn0514kg2mr9n3";
+    rev = "3.3.0";
+    sha256 = "0vf7s4m14aqhdg4m2yjj87kjxi2gpa46mgx86p0a91jwvkxa8a1q";
   };
 
   buildInputs = [ qtbase qtquickcontrols2 ];
   propagatedBuildInputs = with python3.pkgs; [ uranium zeroconf pyserial numpy-stl ];
   nativeBuildInputs = [ cmake python3.pkgs.wrapPython ];
 
-  cmakeFlags = [ "-DURANIUM_DIR=${python3.pkgs.uranium.src}" ];
+  cmakeFlags = [
+    "-DURANIUM_DIR=${python3.pkgs.uranium.src}"
+    "-DCURA_VERSION=${version}"
+  ];
 
   postPatch = ''
     sed -i 's,/python''${PYTHON_VERSION_MAJOR}/dist-packages,/python''${PYTHON_VERSION_MAJOR}.''${PYTHON_VERSION_MINOR}/site-packages,g' CMakeLists.txt
diff --git a/pkgs/applications/misc/curaengine/default.nix b/pkgs/applications/misc/curaengine/default.nix
index c3a19e6551a2..ac4c68f9b536 100644
--- a/pkgs/applications/misc/curaengine/default.nix
+++ b/pkgs/applications/misc/curaengine/default.nix
@@ -2,19 +2,19 @@
 
 stdenv.mkDerivation rec {
   name = "curaengine-${version}";
-  version = "3.2.1";
+  version = "3.3.0";
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "CuraEngine";
     rev = version;
-    sha256 = "1yqpp6qhixzni3ik11vbk5kcdrhlz2j4ylzmh8f6c86r4d73a0cp";
+    sha256 = "1dj80lk58qb54apdv7n9cmcck4smb00lidgqld21xnndnnqqb4lw";
   };
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ libarcus ];
 
-  enableParallelBuilding = true;
+  cmakeFlags = [ "-DCURA_ENGINE_VERSION=${version}" ];
 
   meta = with stdenv.lib; {
     description = "A powerful, fast and robust engine for processing 3D models into 3D printing instruction";
diff --git a/pkgs/development/python-modules/libarcus/default.nix b/pkgs/development/python-modules/libarcus/default.nix
index d9cc5fb0d9e5..cf556a790033 100644
--- a/pkgs/development/python-modules/libarcus/default.nix
+++ b/pkgs/development/python-modules/libarcus/default.nix
@@ -7,7 +7,7 @@ else
 stdenv.mkDerivation rec {
   pname = "libarcus";
   name = "${pname}-${version}";
-  version = "3.2.1";
+  version = "3.3.0";
   
   src = fetchFromGitHub {
     owner = "Ultimaker";
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Communication library between internal components for Ultimaker software";
-    homepage = "https://github.com/Ultimaker/libArcus";
+    homepage = https://github.com/Ultimaker/libArcus;
     license = licenses.agpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ abbradar ];
diff --git a/pkgs/development/python-modules/pyqt/5.x.nix b/pkgs/development/python-modules/pyqt/5.x.nix
index 331366e379dd..d9de2edce683 100644
--- a/pkgs/development/python-modules/pyqt/5.x.nix
+++ b/pkgs/development/python-modules/pyqt/5.x.nix
@@ -1,4 +1,4 @@
-{ lib, fetchurl, pythonPackages, pkgconfig, makeWrapper, qmake
+{ lib, fetchurl, pythonPackages, pkgconfig, makeWrapper, qmake, fetchpatch
 , lndir, qtbase, qtsvg, qtwebkit, qtwebengine, dbus_libs
 , withWebSockets ? false, qtwebsockets
 , withConnectivity ? false, qtconnectivity
@@ -64,6 +64,17 @@ in buildPythonPackage {
     runHook postConfigure
   '';
 
+  patches = [
+    # This patch from Arch Linux fixes Cura segfaulting on startup
+    # https://github.com/Ultimaker/Cura/issues/3438
+    # It can probably removed on 5.10.3
+    (fetchpatch {
+      name = "pyqt5-cura-crash.patch";
+      url = https://git.archlinux.org/svntogit/packages.git/plain/repos/extra-x86_64/pyqt5-cura-crash.patch?id=6cfe64a3d1827e0ed9cc62f1683a53b582315f4f;
+      sha256 = "02a0mw1z8p9hhqhl4bgjrmf1xq82xjmpivn5bg6r4yv6pidsh7ck";
+    })
+  ];
+
   postInstall = ''
     for i in $out/bin/*; do
       wrapProgram $i --prefix PYTHONPATH : "$PYTHONPATH"