Error 1 when compiling gobject-introspection

[Luca Beurer-Kellner <lucabeurerkellner googlemail com>]

Hey there, i want to compile gobject-introspection to build my own GNOME Desktop. But when i build it using jhbuild, it abort:
*** Building gobject-introspection *** [10/10]
make  -j9
make  all-recursive
make[1]: Entering directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7'
Making all in girepository
make[2]: Entering directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/girepository'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/girepository'
Making all in giscanner
make[2]: Entering directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/giscanner'
make  all-am
make[3]: Entering directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/giscanner'
make[3]: Nothing to be done for `all-am'.
make[3]: Leaving directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/giscanner'
make[2]: Leaving directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/giscanner'
Making all in tools
make[2]: Entering directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/tools'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/tools'
Making all in gir
make[2]: Entering directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/gir'
  GISCAN Gio-2.0.gir
/home/luca/Programme/GNOME/gobject-introspection-0.6.7/gir/tmp-introspectdapSSy/.libs/Gio-2.0: symbol lookup error: /home/luca/Programme/GNOME/gobject-introspection-0.6.7/gir/tmp-introspectdapSSy/.libs/Gio-2.0: undefined symbol: g_converter_get_type
Command '['/home/luca/Programme/GNOME/gobject-introspection-0.6.7/gir/tmp-introspectdapSSy/Gio-2.0', '--introspect-dump=/home/luca/Programme/GNOME/gobject-introspection-0.6.7/gir/tmp-introspectdapSSy/types.txt,/home/luca/Programme/GNOME/gobject-introspection-0.6.7/gir/tmp-introspectdapSSy/dump.xml']' returned non-zero exit status 127
make[2]: *** [Gio-2.0.gir] Error 1
make[2]: Leaving directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7/gir'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/luca/Programme/GNOME/gobject-introspection-0.6.7'
make: *** [all] Error 2
*** Error during phase build of gobject-introspection: ########## Error running make  -j9 *** [10/10]

  [1] Rerun phase build
  [2] Ignore error and continue to install
  [3] Give up on module
  [4] Start shell
  [5] Reload configuration
  [6] Go to phase "wipe directory and start over"
  [7] Go to phase "configure"
  [8] Go to phase "clean"
  [9] Go to phase "distclean"
choice: 


I hope someone can help me. BTW I'm using Gentoo 64-bit.