Electrum - source tarballs are empty
as the folders are moved around https://gitlab.com/fdroid/fdroiddata/-/blob/master/metadata/org.electrum.electrum.yml#L723
Ideally the last line in prebuild: would bring the folder back in place
then the first line of build: would move it back
thanks to @leoheitmannruiz that noticed it in https://codeberg.org/lhr/fdroid-deleted-images-finder