diff --git a/pkgs/applications/misc/cura/default.nix b/pkgs/applications/misc/cura/default.nix
index d570a2570d1..958b0d4844b 100644
--- a/pkgs/applications/misc/cura/default.nix
+++ b/pkgs/applications/misc/cura/default.nix
@@ -2,20 +2,20 @@
 
 mkDerivation rec {
   name = "cura-${version}";
-  version = "4.0.0";
+  version = "4.1.0";
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "Cura";
     rev = version;
-    sha256 = "18pxlmrw8m2mir177f0j9bma7rk29vam91gd86c0d458nw21q2qf";
+    sha256 = "1mfpnjrh3splpkadgml3v71k939g56zb9hbmzghwfjwlrf8valmz";
   };
 
   materials = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "fdm_materials";
     rev = version;
-    sha256 = "0g2dkph0ll7d9109n17vmfwb4fpc8lhyb1z1q68j8vblyvg08d12";
+    sha256 = "0yp2162msxfwpixzvassn23p7r3swjpwk4nhsjka5w6fm8pv0wpl";
   };
 
   buildInputs = [ qtbase qtquickcontrols2 qtgraphicaleffects ];
@@ -27,12 +27,6 @@ mkDerivation rec {
   cmakeFlags = [
     "-DURANIUM_DIR=${python3.pkgs.uranium.src}"
     "-DCURA_VERSION=${version}"
-
-    # see https://github.com/Ultimaker/Cura/issues/5142
-    "-DCURA_SDK_VERSION=6.0.0"
-
-    # remove after 4.0.0, see https://github.com/void-linux/void-packages/pull/9880#issuecomment-475453025
-    "-DCURA_CLOUD_API_VERSION=1"
   ];
 
   postPatch = ''
diff --git a/pkgs/applications/misc/curaengine/default.nix b/pkgs/applications/misc/curaengine/default.nix
index 9188e461e51..25cfccd3ed3 100644
--- a/pkgs/applications/misc/curaengine/default.nix
+++ b/pkgs/applications/misc/curaengine/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   name = "curaengine-${version}";
-  version = "4.0.0";
+  version = "4.1.0";
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "CuraEngine";
     rev = version;
-    sha256 = "0p4zcckrlrpyp5xdqgvp0phmawyh4cy8vipim9fvgsfcin4vhrv7";
+    sha256 = "14zy9ir46vndsi4l8kapm6byw02fimm7ava2rfi0kvcckf5yq9w8";
   };
 
   nativeBuildInputs = [ cmake ];
diff --git a/pkgs/development/python-modules/libarcus/default.nix b/pkgs/development/python-modules/libarcus/default.nix
index 67194966949..add1957dd6d 100644
--- a/pkgs/development/python-modules/libarcus/default.nix
+++ b/pkgs/development/python-modules/libarcus/default.nix
@@ -1,16 +1,16 @@
-{ stdenv, buildPythonPackage, fetchFromGitHub
+{ stdenv, buildPythonPackage, python, fetchFromGitHub
 , cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "libarcus";
-  version = "4.0.0";
+  version = "4.1.0";
   format = "other";
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "libArcus";
     rev = version;
-    sha256 = "14c62bsc2cynhaajpdidcqpq2vqwshrdkqyzwvpsjjbfmlx3b1ay";
+    sha256 = "1x06daijxbrqj0dlxmi2zn7ap74zf6hih3krmkwhvarm2nr052g4";
   };
 
   disabled = pythonOlder "3.4.0";
@@ -20,8 +20,7 @@ buildPythonPackage rec {
   buildInputs = [ protobuf ];
 
   postPatch = ''
-    # To workaround buggy SIP detection which overrides PYTHONPATH
-    sed -i '/SET(ENV{PYTHONPATH}/d' cmake/FindSIP.cmake
+    sed -i 's#''${Python3_SITELIB}#${placeholder "out"}/${python.sitePackages}#' cmake/SIPMacros.cmake
   '';
 
   meta = with stdenv.lib; {
diff --git a/pkgs/development/python-modules/libsavitar/default.nix b/pkgs/development/python-modules/libsavitar/default.nix
index dc783ba8f33..f0fbcf5f311 100644
--- a/pkgs/development/python-modules/libsavitar/default.nix
+++ b/pkgs/development/python-modules/libsavitar/default.nix
@@ -1,20 +1,19 @@
-{ stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, cmake, sip }:
+{ stdenv, buildPythonPackage, python, pythonOlder, fetchFromGitHub, cmake, sip }:
 
 buildPythonPackage rec {
   pname = "libsavitar";
-  version = "4.0.0";
+  version = "4.1.0";
   format = "other";
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
     repo = "libSavitar";
     rev = version;
-    sha256 = "1q70l37qafzfkpw8vlagmpd2w576b6jc1xmxp3wf3qfq45j8kya0";
+    sha256 = "132bgcvjkr61pzf244hwz8gxzpg1i50na4bkcipwnyxdravdkkgf";
   };
 
   postPatch = ''
-    # To workaround buggy SIP detection which overrides PYTHONPATH
-    sed -i '/SET(ENV{PYTHONPATH}/d' cmake/FindSIP.cmake
+    sed -i 's#''${Python3_SITELIB}#${placeholder "out"}/${python.sitePackages}#' cmake/SIPMacros.cmake
   '';
 
   nativeBuildInputs = [ cmake ];
diff --git a/pkgs/development/python-modules/uranium/default.nix b/pkgs/development/python-modules/uranium/default.nix
index b4081870fbe..6365846bd26 100644
--- a/pkgs/development/python-modules/uranium/default.nix
+++ b/pkgs/development/python-modules/uranium/default.nix
@@ -2,7 +2,7 @@
 , pyqt5, numpy, scipy, shapely, libarcus, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage rec {
-  version = "4.0.0";
+  version = "4.1.0";
   pname = "uranium";
   format = "other";
 
@@ -10,7 +10,7 @@ buildPythonPackage rec {
     owner = "Ultimaker";
     repo = "Uranium";
     rev = version;
-    sha256 = "1dzn064np76q0xpypcwsa7k7arzihg79xw1pgcvdizk9kzc6rw3y";
+    sha256 = "0vjlir9rd3xdlb8icdcr51qjmnh8nny6ajycria9idccriaqficj";
   };
 
   disabled = pythonOlder "3.5.0";