Comment 1 for bug 418426

You could replace "Depend on libcanberra-gtk" with "Build-Depend on libcanberra-gtk-dev" for clarity.

Also the new gdm FTBFS for some reason.

xsltproc -o gdm-uk.omf --stringparam db2omf.basename gdm --stringparam db2omf.format 'docbook' --stringparam db2omf.dtd "-//OASIS//DTD DocBook XML V4.1.2//EN" --stringparam db2omf.lang uk --stringparam db2omf.omf_dir "/usr/share/omf" --stringparam db2omf.help_dir "/usr/share/gnome/help" --stringparam db2omf.omf_in "/tmp/buildd/gdm-2.27.90/docs/gdm.omf.in" `/usr/bin/pkg-config --variable db2omf gnome-doc-utils` uk/gdm.xml || { rm -f "gdm-uk.omf"; exit 1; }
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %list.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %admon.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %linespecific.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %synop.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %para.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %informal.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %formal.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %compound.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %genobj.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %descobj.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:115: parser warning : PEReference: %ndxterm.class; not found
  %local.divcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %list.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %admon.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %linespecific.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %synop.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %para.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %informal.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %formal.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %compound.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %genobj.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %descobj.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:125: parser warning : PEReference: %ndxterm.class; not found
  %local.refcomponent.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:135: parser warning : PEReference: %linespecific.class; not found
  %local.indexdivcomponent.mix;">
                                ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:135: parser warning : PEReference: %synop.class; not found
  %local.indexdivcomponent.mix;">
                                ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:135: parser warning : PEReference: %para.class; not found
  %local.indexdivcomponent.mix;">
                                ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:135: parser warning : PEReference: %informal.class; not found
  %local.indexdivcomponent.mix;">
                                ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:135: parser warning : PEReference: %link.char.class; not found
  %local.indexdivcomponent.mix;">
                                ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:141: parser warning : PEReference: %tech.char.class; not found
  %local.refname.char.mix;">
                           ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %xref.char.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %gen.char.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %link.char.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %tech.char.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %base.char.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %docinfo.char.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %other.char.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:156: parser warning : PEReference: %ndxterm.class; not found
  %local.refinline.char.mix;">
                             ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:204: parser warning : PEReference: %role.attrib; not found
<!ENTITY % set.role.attrib "%role.attrib;">
                                          ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:219: parser warning : PEReference: %status.attrib; not found
  %status.attrib;
                 ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:220: parser warning : PEReference: %common.attrib; not found
  %common.attrib;
                 ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:230: parser warning : PEReference: %role.attrib; not found
<!ENTITY % setinfo.role.attrib "%role.attrib;">
                                              ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:236: parser warning : PEReference: %bibliocomponent.mix; not found
 | keywordset | itermset | %bibliocomponent.mix;)+)>
                                                ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:236: parser error : ContentDecl : Name or '(' expected
 | keywordset | itermset | %bibliocomponent.mix;)+)>
                                                ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:236: parser error : expected '>'
 | keywordset | itermset | %bibliocomponent.mix;)+)>
                                                  ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:236: parser error : Content error in the external subset
 | keywordset | itermset | %bibliocomponent.mix;)+)>
                                                  ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:243: parser warning : PEReference: %setinfo.attlist; not found
<![%setinfo.attlist;[
                    ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:243: parser error : conditional section INCLUDE or IGNORE keyword expected
<![%setinfo.attlist;[
                    ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:243: parser error : Content error in the external subset
<!ATTLIST setinfo
 ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:243: parser error : Content error in the external subset
<!ATTLIST setinfo
    ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:243: validity error : All markup of the conditional section is not in the same entity
<!ATTLIST setinfo
    ^
http://www.oasis-open.org/docbook/xml/4.1.2/dbhierx.mod:243: parser error : Content error in the external subset
<!ATTLIST setinfo
       ^
unable to parse uk/gdm.xml
make[3]: *** [gdm-uk.omf] Error 1
make[3]: Leaving directory `/tmp/buildd/gdm-2.27.90/docs'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/buildd/gdm-2.27.90'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/tmp/buildd/gdm-2.27.90'
make: *** [debian/stamp-makefile-build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2