They were disabled on master as they make builds way too long, but for the stable branch they make sense, as it is synced manually. (cherry picked from commit 763f6a9555a007210f9dc255bb07483d10a83a9b)
@@ -7,4 +7,6 @@ build:
# Disable (single) htmlzip as it's way too big to be useful,
# and leads to excessive memory usage on build
# Disable epub and pdf for now to speed up builds
-formats: []
+formats:
+ - pdf
+ - epub