Is there any sensible way to know what qt5 devel packages might be needed as build-depends

[Andreas Tille <andreas@an3as.eu>]

Hi,

I try to port clonalframe[1] to Qt5 and I somehow wild-guessed what
Build-Depends might be needed.  Anyway I got

  qmake: could not find a Qt installation of ''

I've got this totally unhelpful message in another package - what
is a sensible approach to find the needed packages?

Kind regards

     Andreas.

[1] https://anonscm.debian.org/git/debian-med/clonalframe.git

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