diff --git a/buildserver/provision-apt-get-install b/buildserver/provision-apt-get-install
index c11d996b..a1b0f4b1 100644
--- a/buildserver/provision-apt-get-install
+++ b/buildserver/provision-apt-get-install
@@ -91,6 +91,7 @@ packages="
  python3-pyasn1-modules
  python3-requests
  python3-yaml
+ python3-ruamel.yaml
  qt5-default
  qtbase5-dev
  quilt