tech-pkg: /usr/pkgsrc/mk/bsd.pkg.mk Error

Subject: /usr/pkgsrc/mk/bsd.pkg.mk Error
To: None <tech-pkg@NetBSD.org>
From: Nicholas Ricketts <nightshade@phreaker.net>
List: tech-pkg
Date: 08/02/2003 16:07:53

What does this error exactly mean. This is the only error left in my pkgsrc 
tree. Any Ideas:

Cannot open '/usr/pkgsrc/mk/../../mk/tools.mk' (from 
/usr/pkgsrc/mk/bsd.pkg.mk): No such file or directory