I have learned that enigmail requires a "graphical" pinentry program, but I found pinentry linked to pinentry-curses. My efforts directed to repairing this fault resulted in deleting pinentry-gtk-2, which was of course the version of pinentry I wanted to use.
Attempts now to install pinentry-gtk-2 spawn notices that it is "already installed." Can pkgsrc be outwitted here? It seems bent on not allowing me by hook or crook to install the coveted gtk-2 version. :( -- In our age there is no such thing as 'keeping out of politics'. All issues are political issues, and politics itself is a mass of lies, evasions, folly, hatred, and schizophrenia. George Orwell "Politics and the English Language" (1946)