It looks as though the way you suggest, would pull in the dependencies for GIMP
2.8, which is the latest stable in the Repo.
What I described pulls the latest development files from git. Big difference.
GIMP 2.8, doesn't support 16/32bit Editing, which was the reason for building
v2.9.1 for me at least in the first place.
Though I agree that building as root can be dangerous.
studiojunkyard (via www.gimpusers.com/forums)
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