Autocomplete missing in manual build

For some reason I don’t have any autocomplete in the python console in my own Blender builds of 2.82 and 2.90, ctrl-space toggles area maximization instead of autocomplete. Also, the shortcut info normally display at the top of the console is missing. I can’t find any cmake setting related to autocomplete.

Any clues what I could check next?

The default key shortcut for autocomplete is Tab, and shortcut information was intentionally removed.