diff --git a/ansible/vars.yml b/ansible/vars.yml
index 777dcfd..0dbd34f 100644
--- a/ansible/vars.yml
+++ b/ansible/vars.yml
@@ -7,3 +7,5 @@ static_sites_dir: /opt/tildes-static-sites
 
 python_full_version: 3.9.5
 python_version: "{{ python_full_version.rpartition('.')[0] }}"
+
+is_docker: "{{ ansible_facts['virtualization_type'] == 'container' }}"
\ No newline at end of file