jhbuild build gtk+-3 : glib 2.27 vs 2.26

[Laurent Wan <dev wan free fr>]

 Hello,

I'm trying to compile gtk+-3 with jhbuild. but i have this error at step 
19/19:

> configure: error: Package requirements (glib-2.0 >= 2.27.1    atk >= 
> 1.29.2    pango >= 1.20    cairo >= 1.10.0    cairo-gobject >= 
> 1.10.0    gdk-pixbuf-2.0 >= 2.21.0) were not met:
>
> Requested 'glib-2.0 >= 2.27.1' but version of GLib is 2.26.0

this is quite normal because glib is on 2.26 branch:

> jhbuild update
> *** Checking out libxml2 *** [1/19]
> *** Checking out libgpg-error *** [2/19]
> *** Checking out libgcrypt *** [3/19]
> *** Checking out libxslt *** [4/19]
> *** Checking out intltool *** [5/19]
> *** Checking out rarian *** [6/19]
> *** Checking out gnome-doc-utils *** [7/19]
> git pull --rebase
> Current branch master is up to date.
> *** Checking out gtk-doc *** [8/19]
> git pull --rebase
> Current branch master is up to date.
> *** Checking out glib *** [9/19]
> git pull --rebase
> Current branch glib-2-26 is up to date.

where do i miss something ?

regards

Laurent Wan.