diff --git a/group/tf-l1-check-docs/build-docs:nil b/group/tf-l1-check-docs/build-docs:nil
index f86e385..5389df0 100644
--- a/group/tf-l1-check-docs/build-docs:nil
+++ b/group/tf-l1-check-docs/build-docs:nil
@@ -6,6 +6,7 @@
 #
 
 pre_tf_build() {
+	poetry -C "$tf_root" install --with doc
 	targets="doc" set_tf_build_targets
 }