diff --git a/.gitlab-scripts/generate-packages.sh b/.gitlab-scripts/generate-packages.sh
index a4d58cdf98..d547d9ddbc 100755
--- a/.gitlab-scripts/generate-packages.sh
+++ b/.gitlab-scripts/generate-packages.sh
@@ -4,6 +4,6 @@ set -eu
 PACKAGES=`realpath "${1}"`
 mkdir -p "${PACKAGES}"
 
-find . -name 'cookiecutter*' -prune -o -name setup.py -print | while read path; do
-    (cd "`dirname ${path}`" && python setup.py sdist && cp dist/* "${PACKAGES}")
-done
+(find . -name 'cookiecutter*' -prune -o -name setup.py -print | while read path; do
+    echo "`dirname ${path}`"
+done) | xargs --max-procs=$(( `nproc` * 2)) -I '{}' python "{}/setup.py" --quiet sdist --dist-dir "${PACKAGES}"