pkg_add: unable to fetch

For example, if you try to install a convmv package


# pkg_add -r convmv
Error: Unable to get ftp://ftp.freebsd.org/pub/FreeBSD/ports/amd64/packages-7.3-release/Latest/convmv.tbz: File unavailable (e.g., file not found, no access)
pkg_add: unable to fetch 'ftp://ftp.freebsd.org/pub/FreeBSD/ports/amd64/packages-7.3-release/Latest/convmv.tbz' by URL


Modify the PACKAGESITE environment variable
# setenv PACKAGESITE ftp://ftp.freebsd.org/pub/FreeBSD/ports/amd64/packages-7-stable/Latest/

then
# pkg_add -r convmv
Fetching ftp://ftp.freebsd.org/pub/FreeBSD/ports/amd64/packages-7-stable/Latest/convmv.tbz... Done.


OR
# pkg_add -r ftp://ftp.freebsd.org/pub/FreeBSD/ports/amd64/packages-7-stable/Latest/convmv.tbz
Fetching ftp://ftp.freebsd.org/pub/FreeBSD/ports/amd64/packages-7-stable/Latest/convmv.tbz... Done.