dep-errors

The following packages have unmet dependencies:
 libcupsimage2-dev:i386 : Depends: libpng-dev:i386 but it is not going to be installed
                          Depends: libjpeg-dev:i386
                          Depends: zlib1g-dev:i386 but it is not going to be installed
                          Recommends: libcupsfilters-dev:i386 but it is not installable
 libfontconfig1-dev:i386 : Depends: libexpat1-dev:i386 but it is not going to be installed
                           Depends: uuid-dev:i386 but it is not going to be installed
 libfreetype6-dev:i386 : Depends: libfreetype-dev:i386 (= 2.10.1-2) but it is not going to be installed
 libgnutls28-dev:i386 : Depends: libc6-dev:i386 but it is not going to be installed or
                                 libc-dev:i386
 libgphoto2-dev:i386 : Depends: libexif-dev:i386 but it is not going to be installed
 libgstreamer-plugins-base1.0-dev:i386 : Depends: libc6-dev:i386 but it is not going to be installed or
                                                  libc-dev:i386
                                         Depends: libgstreamer1.0-dev:i386 (>= 1.16.2) but it is not going to be installed
                                         Depends: libglib2.0-dev:i386 but it is not going to be installed
 libibus-1.0-dev:i386 : Depends: libglib2.0-dev:i386 but it is not going to be installed
 libkrb5-dev:i386 : Depends: krb5-multidev:i386 (= 1.17-6ubuntu4) but it is not going to be installed
 libncurses-dev:i386 : Depends: libc6-dev:i386 but it is not going to be installed or
                                libc-dev:i386
 libpcap-dev:i386 : Depends: libpcap0.8-dev:i386 but it is not going to be installed
 libpulse-dev:i386 : Depends: libglib2.0-dev:i386 but it is not going to be installed
 libtiff-dev:i386 : Depends: libc6-dev:i386 but it is not going to be installed or
                             libc-dev:i386
                    Depends: libjpeg-dev:i386
                    Depends: zlib1g-dev:i386 but it is not going to be installed
 libxml2-dev:i386 : Depends: libicu-dev:i386 but it is not going to be installed
 xserver-xorg-dev : Conflicts: xserver-xorg-dev:i386 but 2:1.20.8-2ubuntu2.4 is to be installed
 xserver-xorg-dev:i386 : Depends: libxfont-dev:i386 but it is not going to be installed
                         Conflicts: xserver-xorg-dev but 2:1.20.8-2ubuntu2.4 is to be installed
E: Unable to correct problems, you have held broken packages.