The errors I get are:

pkg_create: can't stat `/usr/pkg/man/man1/mailq.1'
pkg_create: can't stat `/usr/pkg/man/man1/newaliases.1'
pkg_create: can't stat `/usr/pkg/man/man1/vacation.1'
pkg_create: can't stat `/usr/pkg/man/man5/aliases.5'
pkg_create: can't stat `/usr/pkg/man/man8/editmap.8'
pkg_create: can't stat `/usr/pkg/man/man8/mailstats.8'
pkg_create: can't stat `/usr/pkg/man/man8/makemap.8'
pkg_create: can't stat `/usr/pkg/man/man8/praliases.8'
pkg_create: can't stat `/usr/pkg/man/man8/sendmail.8'
pkg_create: can't stat `/usr/pkg/man/man8/smrsh.8'
===> Registering installation for sendmail-8.13.6nb2
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man1/mailq.1' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man1/newaliases.1' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man1/vacation.1' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man5/aliases.5' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man8/editmap.8' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man8/mailstats.8' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man8/makemap.8' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man8/praliases.8' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man8/sendmail.8' is in +CONTENTS but not on filesystem!
pkg_admin: sendmail-8.13.6nb2: File `/usr/pkg/man/man8/smrsh.8' is in +CONTENTS but not on filesystem!
===> Building binary package for sendmail-8.13.6nb2
Creating package /usr/pkgsrc/packages/All/sendmail-8.13.6nb2.tgz
Using SrcDir value of /usr/pkg
pkg_create: can't stat `/usr/pkg/man/man1/mailq.1'
pkg_create: can't stat `/usr/pkg/man/man1/newaliases.1'
pkg_create: can't stat `/usr/pkg/man/man1/vacation.1'
pkg_create: can't stat `/usr/pkg/man/man5/aliases.5'
pkg_create: can't stat `/usr/pkg/man/man8/editmap.8'
pkg_create: can't stat `/usr/pkg/man/man8/mailstats.8'
pkg_create: can't stat `/usr/pkg/man/man8/makemap.8'
pkg_create: can't stat `/usr/pkg/man/man8/praliases.8'
pkg_create: can't stat `/usr/pkg/man/man8/sendmail.8'
pkg_create: can't stat `/usr/pkg/man/man8/smrsh.8'
tar: Unable to access man/man1/mailq.1 (No such file or directory)
tar: Unable to access man/man1/newaliases.1 (No such file or directory)
tar: Unable to access man/man1/vacation.1 (No such file or directory)
tar: Unable to access man/man5/aliases.5 (No such file or directory)
tar: Unable to access man/man8/editmap.8 (No such file or directory)
tar: Unable to access man/man8/mailstats.8 (No such file or directory)
tar: Unable to access man/man8/makemap.8 (No such file or directory)
tar: Unable to access man/man8/praliases.8 (No such file or directory)
tar: Unable to access man/man8/sendmail.8 (No such file or directory)
tar: Unable to access man/man8/smrsh.8 (No such file or directory)
tar: WARNING! These file names were not selected:
man/man1/mailq.1
man/man1/newaliases.1
man/man1/vacation.1
man/man5/aliases.5
man/man8/editmap.8
man/man8/mailstats.8
man/man8/makemap.8
man/man8/praliases.8
man/man8/sendmail.8
man/man8/smrsh.8
pkg_create: tar command failed with code 1


-- 
Hisashi T Fujinaka - htodd@twofifty.com
BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte