(use-modules (gnu packages) (guix gnu-maintenance) (ice-9 pretty-print)) (define gnu-packages (official-gnu-packages)) (define available-gnu-packages (map gnu-package-name gnu-packages)) (define missing-gnu-packages (filter (lambda (x) (null? (find-packages-by-name (gnu-package-name x)))) gnu-packages)) (pretty-print (map gnu-package-name missing-gnu-packages))