=> Bootstrap dependency digest>=20010302: found digest-20080510 ===> Installing for swi-prolog-packages-5.6.17nb1 => Generating pre-install file lists Error: Environment variable DISPLAY must be set and point to a connectible X server. *** Error code 1 Stop. bmake: stopped in /usr/pkgsrc/lang/swi-prolog-packages *** Error code 1 Stop. bmake: stopped in /usr/pkgsrc/lang/swi-prolog-packages *** Error code 1 Stop. bmake: stopped in /usr/pkgsrc/lang/swi-prolog-packages