diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 00283bf892bdfcd73604ecbba8578dcc7d66241f..57fc878558a2ccca82bcb5f71da4e68ca87fbfaf 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,8 +2,10 @@ pages-devel:
   stage: deploy
   script:
     - cp -r ckanext-theme_hft/* /usr/lib/ckan/default/src/ckanext-theme_hft/
+    - . /usr/lib/ckan/default/bin/activate
     - cd /usr/lib/ckan/default/src/ckanext-theme_hft
     - python setup.py develop
+    - deactivate
   artifacts:
     paths:
       - ckanext-theme_hft