Execution

(You may check individual package)

cd /usr/pkgsrc/category/packagename;
perl check-update

CF-N10@makoto 170306(..mail/cyrus-imapd23)% /export/git-work/check-update/check-update 
         cyrus-imapd             (=) (4580 ) Now:   2.3.18 ->  2.3.19 Todo:       

(no output if the package is up-to-date)