Can you please have a look if virtual/awk is sufficient or if gawk is needed.
Only the usual configure stuff depends on awk, so virtual/awk is fine.
+ 28 Feb 2013; Christoph Junghans <ottxor@gentoo.org> ktoblzcheck-1.33.ebuild, + ktoblzcheck-1.39.ebuild: + switched to virtual/awk (bug #455642)