diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1356189..4768351 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -99,7 +99,7 @@ build_archlinux:
   stage: build
   image: archlinux/base:latest  # Use an archlinux image instead of the customized debian image.
   script:
-  - pacman -Sy --noconfirm python python-setuptools python-pip python-wheel python-jinja python-pillow python-magic file
+  - pacman -Sy --noconfirm python python-setuptools python-pip python-wheel python-jinja python-pillow python-magic file sudo
   - export MATEMAT_VERSION=$(python -c 'import matemat; print(matemat.__version__)')
   - cp -r static/ package/archlinux/matemat/usr/lib/matemat/static/
   - cp -r templates/ package/archlinux/matemat/usr/lib/matemat/templates/