diff --git a/scripts/setup-ubuntu.sh b/scripts/setup-ubuntu.sh
index 40cd26900..defe9d532 100755
--- a/scripts/setup-ubuntu.sh
+++ b/scripts/setup-ubuntu.sh
@@ -111,6 +111,9 @@ PACKAGES+=" lld"
 # Needed by gitea.
 PACKAGES+=" npm"
 
+# Needed by libduktape (2.5.0 still uses python2 unfortunately)
+PACKAGES+=" python-yaml"
+
 # Java.
 PACKAGES+=" openjdk-8-jdk"