[SOLVED] Issues building darktable manual from git (Ubuntu 20.04)

[solved … found it in launchpad:
0.20.10-5 : gnome-doc-utils : amd64 : Focal (20.04) : Ubuntu ]

Hi,

unfortunately I can not find the package gnome-doc-utils in the repos I access under Ubuntu 20.04 …

So there might be an issue here?