diff --git a/Jenkinsfile b/Jenkinsfile
index 6a9f3d8..fcb760d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -43,7 +43,7 @@ pipeline {
                     . .venv/bin/activate
                     pip install coverage
                     pip install --upgrade pip "setuptools==69.5.1" wheel
-                    PIP_INDEX_URL=${PIP_INDEX_URL:-https://pypi.mandelblog.com/mandel/testing/+simple/} pip install --pre --editable . setuptools wheel --upgrade --upgrade-strategy=eager --use-deprecated=legacy-resolver
+                    PIP_INDEX_URL=${PIP_INDEX_URL:-https://pypi.mandelblog.com/mandel/testing/+simple/} pip install --no-build-isolation --pre --editable . setuptools wheel --upgrade --upgrade-strategy=eager --use-deprecated=legacy-resolver
                     cp "${JOB_BASE_NAME}/ocyan.json" "${JOB_BASE_NAME}/${JOB_BASE_NAME}.json"
                     pip install pylint pylint-django vdt.versionplugin.wheel
                     pip install --upgrade "setuptools==69.5.1" wheel