diff --git a/.drone.star b/.drone.star
index 8e1104db1..e1e6707f3 100644
--- a/.drone.star
+++ b/.drone.star
@@ -8,7 +8,7 @@
 # As the yaml syntax for Drone CI is rather limited.
 #
 #
-globalenv={'B2_CI_VERSION': '1', 'B2_VARIANT': 'release'}
+globalenv={'B2_CI_VERSION': '1', 'ADD_UBUNTU_TOOLCHAIN_PPA': 'true', 'B2_VARIANT': 'release'}
 linuxglobalimage="cppalliance/droneubuntu1804:1"
 windowsglobalimage="cppalliance/dronevs2019"