Upgrading Telepathy-glib-0.18.2 to 0.20.2 fails

[Sindrome]

I’m trying to upgrade telepathy-glib-0.18.2 to 0.20.2 and it’s failing with
the following error.  It seems it's not finding Glib-2.0 and Gio-2.0.  Are
these packages supposed to be part of the build? Anyone familiar with those
exact packages?  Why wouldn't it build the dependencies?


telepathy-glib-0.18.2               <   needs updating (port has 0.20.2)


portupgrade telepathy-glib-0.18.2


gmake[2]: Leaving directory
`/usr/ports/net-im/telepathy-glib/work/telepathy-glib-0.20.2/telepathy-glib'
Making all in vala
gmake[2]: Entering directory
`/usr/ports/net-im/telepathy-glib/work/telepathy-glib-0.20.2/vala'
/usr/local/bin/vapigen \
        --library telepathy-glib \
        --metadatadir=../telepathy-glib \
        --pkg gio-2.0 \
        ../telepathy-glib/TelepathyGLib-0.12.gir \

error: Package `GLib-2.0' not found in specified Vala API directories or
GObject-Introspection GIR directories
error: Package `Gio-2.0' not found in specified Vala API directories or
GObject-Introspection GIR directories Generation failed: 2 error(s), 0
warning(s)
gmake[2]: *** [telepathy-glib.vapi] Error 1
gmake[2]: Leaving directory
`/usr/ports/net-im/telepathy-glib/work/telepathy-glib-0.20.2/vala'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory
`/usr/ports/net-im/telepathy-glib/work/telepathy-glib-0.20.2'
gmake: *** [all] Error 2
*** [do-build] Error code 1

Stop in /usr/ports/net-im/telepathy-glib.
** Command failed [exit code 1]: /usr/bin/script -qa
/tmp/portupgrade20130807-60458-r86key env UPGRADE_TOOL=portupgrade
UPGRADE_PORT=telepathy-glib-0.18.2 UPGRADE_PORT_VER=0.18.2 make
** Fix the problem and try again.
** Listing the failed packages (-:ignored / *:skipped / !:failed)
        ! net-im/telepathy-glib (telepathy-glib-0.18.2) (new compiler error)