diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8ec7b4cc..56b0469f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -99,6 +99,7 @@ cleanup_win:
     - pwd
     - ls
     - docker info
+    - export PYTHONPATH=/opt/netgen/`python3 -c "import os.path, sysconfig;print(os.path.relpath(sysconfig.get_path('platlib'), sysconfig.get_path('data')))"`
   variables:
     UBUNTU_VERSION: "22.04"
 
@@ -112,6 +113,7 @@ build_ubuntu_debug:
       docker run
       --cidfile netgen_${CI_PIPELINE_ID}_${UBUNTU_VERSION}.id
       -e CCACHE_DIR=/ccache
+      -e PYTHONPATH=$PYTHONPATH
       -v /mnt/ccache:/ccache
       netgen_${CI_PIPELINE_ID}:${UBUNTU_VERSION}
       bash /root/src/netgen/tests/build_debug.sh
@@ -128,6 +130,7 @@ build_ubuntu_mpi:
       docker run>-
       --cidfile netgen_mpi_${CI_PIPELINE_ID}_${UBUNTU_VERSION}.id>-
       -e CCACHE_DIR=/ccache
+      -e PYTHONPATH=$PYTHONPATH
       -e RUN_SLOW_TESTS=${RUN_SLOW_TESTS}
       -v /mnt/ccache:/ccache
       netgen_mpi_${CI_PIPELINE_ID}:${UBUNTU_VERSION}
@@ -141,8 +144,7 @@ test_ubuntu_debug:
   script:
     - >-
       docker run
-      -e NETGENDIR=/opt/netgen/bin
-      -e PYTHONPATH=/opt/netgen/lib/python3/dist-packages
+      -e PYTHONPATH=$PYTHONPATH
       netgen_${CI_PIPELINE_ID}_installed:${UBUNTU_VERSION}
       bash -c 'cd /root/build/netgen && make test_netgen ARGS="-V --output-on-failure"'
   needs: ["build_ubuntu_debug"]
@@ -154,8 +156,7 @@ test_ubuntu_mpi:
     - >-
       docker run
       -e RUN_SLOW_TESTS=${RUN_SLOW_TESTS}
-      -e NETGENDIR=/opt/netgen/bin
-      -e PYTHONPATH=/opt/netgen/lib/python3/dist-packages
+      -e PYTHONPATH=$PYTHONPATH
       netgen_mpi_${CI_PIPELINE_ID}_installed:${UBUNTU_VERSION}
       bash -c 'cd /root/build/netgen && make test_netgen ARGS="-V --output-on-failure"'
   needs: ["build_ubuntu_mpi"]
@@ -168,7 +169,7 @@ test_build_ngsolve:
     - >-
       docker run
       -e NETGENDIR=/opt/netgen/bin
-      -e PYTHONPATH=/opt/netgen/lib/python3/dist-packages
+      -e PYTHONPATH=$PYTHONPATH
       -e MKLROOT=/opt/intel/mkl
       -v /opt/intel:/opt/intel
       -e CCACHE_DIR=/ccache
@@ -215,7 +216,7 @@ cleanup_ubuntu:
     - export SRC_DIR=$ROOT_DIR/src
     - export BUILD_DIR=$ROOT_DIR/build
     - export CMAKE_INSTALL_PREFIX=/tmp/$CI_PIPELINE_ID/install/Netgen.app
-    - export PYTHONPATH=$CMAKE_INSTALL_PREFIX/Contents/Resources/`python3 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1,0,''))"`:.
+    - export PYTHONPATH=$CMAKE_INSTALL_PREFIX/Contents/Resources/`python3 -c "import os.path, sysconfig;print(os.path.relpath(sysconfig.get_path('platlib'), sysconfig.get_path('data')))"`:.
     - export PATH=$CMAKE_INSTALL_PREFIX/Contents/MacOS:$PATH
 
 build_mac:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ddea54cf..4b0a57c0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -93,7 +93,7 @@ if(USE_PYTHON)
   endif()
 
   if(NOT CMAKE_CROSSCOMPILING)
-    execute_process(COMMAND ${Python3_EXECUTABLE} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1,0,''))" OUTPUT_VARIABLE PYTHON_PACKAGES_INSTALL_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
+      execute_process(COMMAND ${Python3_EXECUTABLE} -c "import os.path, sysconfig;print(os.path.relpath(sysconfig.get_path('platlib'), sysconfig.get_path('data')))" OUTPUT_VARIABLE PYTHON_PACKAGES_INSTALL_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
       file(TO_CMAKE_PATH ${PYTHON_PACKAGES_INSTALL_DIR} PYTHON_PACKAGES_INSTALL_DIR)
   endif(NOT CMAKE_CROSSCOMPILING)
 endif(USE_PYTHON)
diff --git a/setup.py b/setup.py
index 3d569574..8d16161c 100644
--- a/setup.py
+++ b/setup.py
@@ -1,12 +1,12 @@
 import glob
-import os
+import os.path
 import sys
 import pathlib
+import sysconfig
 
 from skbuild import setup
 import skbuild.cmaker
 from subprocess import check_output
-from distutils.sysconfig import get_python_lib;
 
 setup_requires = []
 
@@ -35,7 +35,7 @@ if len(version)>1:
 else:
     version = version[0]
 
-py_install_dir = get_python_lib(1,0,'').replace('\\','/')
+py_install_dir = os.path.relpath(sysconfig.get_path('platlib'), sysconfig.get_path('data')).replace('\\','/')
 
 name = "netgen-mesher"
 arch = None