eferreira@ubuntu:~$ sudo apt-get install libgtkmm-3.0-1v5:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libgtkmm-3.0-1v5:i386 : Depends: libgtk-3-0:i386 (>= 3.16.2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
eferreira@ubuntu:~$ sudo apt-get install libgtk-3-0:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libgtk-3-0:i386 : Depends: libepoxy0:i386 (>= 1.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
eferreira@ubuntu:~$ sudo apt-get install libepoxy0:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  accountsservice-ubuntu-schemas adium-theme-ubuntu apg app-install-data
  apparmor-easyprof apparmor-easyprof-ubuntu appmenu-qt appmenu-qt5
  apt-xapian-index apturl-common avahi-utils bluez-obexd cheese-common click
  click-apparmor compiz-core compiz-plugins-default cracklib-runtime
  cups-pk-helper dbus-property-service dconf-cli duplicity empathy-common
  espeak-data evolution-data-server-common
  evolution-data-server-online-accounts folks-common gedit-common
  geoclue-ubuntu-geoip gir1.2-accounts-1.0 gir1.2-atspi-2.0 gir1.2-click-0.4
  gir1.2-gdata-0.0 gir1.2-gee-0.8 gir1.2-gmenu-3.0 gir1.2-gnomekeyring-1.0
  gir1.2-goa-1.0 gir1.2-ibus-1.0 gir1.2-json-1.0 gir1.2-notify-0.7
  gir1.2-secret-1 gir1.2-signon-1.0 gir1.2-udisks-2.0
  gnome-control-center-data gnome-control-center-shared-data gnome-menus
  gnome-session-common gnome-settings-daemon-schemas gnome-video-effects
  gsettings-ubuntu-schemas gstreamer1.0-nice gtk2-engines-murrine
  guile-2.0-libs ibus-gtk im-config indicator-datetime indicator-messages
  indicator-network indicator-power indicator-session indicator-sound
  intel-gpu-tools ippusbxd jayatana laptop-detect libaccounts-glib0
  libaccounts-qt5-1 libandroid-properties1 libatk-bridge2.0-dev libatk1.0-dev
  libatkmm-1.6-dev libatspi2.0-dev libavahi-gobject0 libbamf3-2
  libboost-log1.58.0 libboost-regex1.58.0 libboost-thread1.58.0 libc-ares2
  libcairo-script-interpreter2 libcairo2-dev libcairomm-1.0-dev
  libcamel-1.2-52 libclick-0.4-0 libcompizconfig0 libconnectivity-qt1
  libcontent-hub0 libcrack2 libdbus-1-dev libdbus-cpp5 libdbus-glib-1-dev
  libdecoration0 libdmapsharing-3.0-2 libdotconf0 libdrm-dev
  libebackend-1.2-10 libebook-contacts-1.2-1 libecal-1.2-18
  libedata-cal-1.2-27 libedataserver-1.2-20 libegl1-mesa-dev libept1.4.16
  libespeak1 libevent-2.0-5 libexiv2-14 libexpat1-dev libfarstream-0.2-5
  libfcitx-config4 libfcitx-gclient0 libfcitx-utils0 libfolks-telepathy25
  libfolks25 libfontconfig1-dev libframe6 libfreerdp-cache1.1
  libfreerdp-client1.1 libfreerdp-codec1.1 libfreerdp-common1.1.0
  libfreerdp-core1.1 libfreerdp-crypto1.1 libfreerdp-gdi1.1
  libfreerdp-locale1.1 libfreerdp-plugins-standard libfreerdp-primitives1.1
  libfreerdp-utils1.1 libfreetype6-dev libgail-common libgail18 libgc1c2
  libgdk-pixbuf2.0-dev libgee-0.8-2 libgee2 libgeis1 libgeocode-glib0
  libgexiv2-2 libgflags2v5 libglewmx1.10 libglib2.0-dev libglibmm-2.4-dev
  libgnome-menu-3-0 libgnomekbd-common libgoogle-glog0v5 libgpod-common
  libgpod4 libgrail6 libgssdp-1.0-3 libgstreamer-plugins-base0.10-0
  libgstreamer0.10-0 libgtksourceview-3.0-common libgtop2-10 libgtop2-common
  libgupnp-1.0-4 libgupnp-igd-1.0-4 libgweather-common libhardware2
  libharfbuzz-dev libharfbuzz-gobject0 libhybris libhybris-common1
  libhybris-utils libibus-1.0-5 libical1a libice-dev libjasper1
  liblightdm-gobject-1-0 liblouis-data liblouis2 liblttng-ust-ctl2
  liblttng-ust0 libmeanwhile1 libmedia1 libminiupnpc10 libmirclient-dev
  libmircommon-dev libmission-control-plugins0 libnatpmp1 libnice10
  libnux-4.0-0 libnux-4.0-common liboxideqt-qmlplugin liboxideqtcore0
  liboxideqtquick0 libpango1.0-dev libpangomm-1.4-dev libpcre3-dev libpcre32-3
  libpcrecpp0v5 libpixman-1-dev libpng12-dev libportaudio2 libprocess-cpp3
  libprotobuf-dev libprotobuf9v5 libpthread-stubs0-dev libpulse-mainloop-glib0
  libpurple-bin libpurple0 libpwquality-common libpwquality1 libqgsttools-p1
  libqmenumodel0 libqofono-qt5-0 libqqwing2v5 libqt4-designer libqt4-help
  libqt4-opengl libqt4-scripttools libqt4-svg libqt4-test libqt5concurrent5
  libqt5multimedia5-plugins libqt5multimediaquick-p5 libqt5multimediawidgets5
  libqt5opengl5 libqt5positioning5 libqt5printsupport5 libqt5systeminfo5
  libqt5webkit5 libqt5xml5 libqt5xmlpatterns5 libqtassistantclient4
  libqtwebkit4 libraw10 librsync1 libsgutils2-2 libsigc++-2.0-dev
  libsignon-extension1 libsignon-glib1 libsignon-plugins-common1
  libsignon-qt5-1 libsm-dev libsonic0 libspeechd2 libssh-4 libsystemsettings1
  libtelepathy-farstream3 libtelepathy-logger3 libtimezonemap-data
  libtrust-store2 libubuntu-app-launch2 libubuntu-download-manager-client1
  libubuntu-download-manager-common1 libudm-common1 libunity-gtk2-parser0
  libunwind8 libupower-glib3 liburcu2 liburl-dispatcher1 libvncclient1
  libvte-2.90-common libwacom-bin libwacom-common libwacom2 libwayland-dev
  libwhoopsie-preferences0 libwinpr-crt0.1 libwinpr-dsparse0.1
  libwinpr-environment0.1 libwinpr-file0.1 libwinpr-handle0.1 libwinpr-heap0.1
  libwinpr-input0.1 libwinpr-interlocked0.1 libwinpr-library0.1
  libwinpr-path0.1 libwinpr-pool0.1 libwinpr-registry0.1 libwinpr-rpc0.1
  libwinpr-sspi0.1 libwinpr-synch0.1 libwinpr-sysinfo0.1 libwinpr-thread0.1
  libwinpr-utils0.1 libx11-dev libx11-doc libx11-xcb-dev libxau-dev
  libxcb-dri2-0-dev libxcb-dri3-dev libxcb-glx0-dev libxcb-present-dev
  libxcb-randr0-dev libxcb-render0-dev libxcb-shape0-dev libxcb-shm0-dev
  libxcb-sync-dev libxcb-xfixes0-dev libxcb1-dev libxcomposite-dev
  libxcursor-dev libxdamage-dev libxdmcp-dev libxext-dev libxfixes-dev
  libxft-dev libxi-dev libxinerama-dev libxkbcommon-dev libxklavier16
  libxrandr-dev libxrender-dev libxshmfence-dev libxtst-dev libxxf86vm-dev
  libzephyr4 lightdm media-player-info metacity-common nux-tools ofono
  oneconf-common oxideqt-codecs python-aptdaemon python-blinker python-bs4
  python-cffi python-cffi-backend python-characteristic python-chardet
  python-cryptography python-cups python-dbus python-dbus-dev python-debian
  python-debtagshw python-defer python-dirspec python-enum34 python-gi
  python-gi-cairo python-html5lib python-httplib2 python-idna python-imaging
  python-ipaddress python-jwt python-lockfile python-lxml python-oauthlib
  python-oneconf python-openssl python-pam python-pil
  python-piston-mini-client python-pkg-resources python-ply python-pyasn1
  python-pyasn1-modules python-pycparser python-qt4 python-qt4-dbus
  python-serial python-service-identity python-sip python-six
  python-twisted-bin python-twisted-core python-twisted-web python-xapian
  python-xdg python-zope.interface python3-apparmor python3-apparmor-click
  python3-blinker python3-brlapi python3-cairo python3-cffi
  python3-cffi-backend python3-click python3-cryptography python3-cups
  python3-cupshelpers python3-feedparser python3-gi-cairo python3-gnupg
  python3-httplib2 python3-idna python3-jwt python3-libapparmor python3-louis
  python3-mako python3-oauthlib python3-oneconf python3-piston-mini-client
  python3-ply python3-pyatspi python3-pycparser python3-smbc python3-speechd
  qmenumodel-qml qml-module-qt-labs-folderlistmodel
  qml-module-qt-labs-settings qml-module-qtmultimedia
  qml-module-qtquick-dialogs qml-module-qtquick-privatewidgets
  qml-module-qtsysteminfo qml-module-ubuntu-connectivity
  qml-module-ubuntu-onlineaccounts qt-at-spi qtdeclarative5-accounts-plugin
  qtdeclarative5-gsettings1.0 qtdeclarative5-ofono0.2
  qtdeclarative5-ubuntu-content1 qtdeclarative5-ubuntu-settings-components
  qtdeclarative5-ubuntu-web-plugin remmina-common rhythmbox-data
  shotwell-common signon-keyring-extension signon-plugin-oauth2
  signon-plugin-password signon-ui signon-ui-service signon-ui-x11 signond
  software-center-aptdaemon-plugins speech-dispatcher
  speech-dispatcher-audio-plugins sqlite3 syslinux syslinux-common
  syslinux-legacy system-config-printer-common system-config-printer-udev
  system-image-common system-image-dbus telepathy-gabble telepathy-haze
  telepathy-logger telepathy-mission-control-5 telepathy-salut
  transmission-common ubuntu-keyboard-data ubuntu-system-service
  ubuntu-touch-sounds ubuntu-wallpapers ubuntuone-client-data
  ubuntuone-credentials-common unity-gtk-module-common unity-gtk2-module
  unity-lens-files unity-lens-music unity-lens-photos unity-lens-video
  unity-schemas unity-scope-audacious unity-scope-chromiumbookmarks
  unity-scope-clementine unity-scope-colourlovers unity-scope-devhelp
  unity-scope-firefoxbookmarks unity-scope-gmusicbrowser unity-scope-gourmet
  unity-scope-guayadeque unity-scope-home unity-scope-musicstores
  unity-scope-musique unity-scope-openclipart unity-scope-texdoc
  unity-scope-tomboy unity-scope-video-remote unity-scope-virtualbox
  unity-scope-yelp unity-scope-zotero unity-scopes-master-default
  unity-scopes-runner unity-webapps-qml upower urfkill usb-creator-common
  webapp-container webbrowser-app whoopsie-preferences x11-apps
  x11-session-utils x11proto-composite-dev x11proto-core-dev
  x11proto-damage-dev x11proto-dri2-dev x11proto-fixes-dev x11proto-gl-dev
  x11proto-input-dev x11proto-kb-dev x11proto-randr-dev x11proto-record-dev
  x11proto-render-dev x11proto-xext-dev x11proto-xf86vidmode-dev
  x11proto-xinerama-dev xbrlapi xinit xorg-sgml-doctools xtrans-dev
  zenity-common zlib1g-dev
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  docbook-xml gcc-5-base:i386 libc6:i386 libcairo-perl libgcc1:i386
  libglib-perl libgtk2-perl libpango-perl librarian0 pinentry-curses
  rarian-compat sgml-data
Suggested packages:
  docbook docbook-dsssl docbook-xsl docbook-defguide glibc-doc:i386
  locales:i386 libfont-freetype-perl libgtk2-perl-doc pinentry-doc perlsgml
  w3-recs opensp libxml2-utils
The following packages will be REMOVED:
  account-plugin-aim account-plugin-facebook account-plugin-flickr
  account-plugin-google account-plugin-jabber account-plugin-salut
  account-plugin-yahoo activity-log-manager adwaita-icon-theme aisleriot
  apport-gtk apturl bamfdaemon baobab brasero brasero-cdrkit cheese compiz
  compiz-gnome deja-dup deja-dup-backend-gvfs empathy eog evince
  evolution-data-server file-roller gcr gedit gir1.2-appindicator3-0.1
  gir1.2-gtk-3.0 gir1.2-gtksource-3.0 gir1.2-peas-1.0 gir1.2-rb-3.0
  gir1.2-totem-1.0 gir1.2-vte-2.91 gir1.2-webkit-3.0 gir1.2-wnck-3.0
  gkbd-capplet gnome-bluetooth gnome-calculator gnome-contacts
  gnome-disk-utility gnome-font-viewer gnome-keyring gnome-mahjongg
  gnome-mines gnome-orca gnome-power-manager gnome-screensaver
  gnome-screenshot gnome-session-bin gnome-session-canberra gnome-sudoku
  gnome-system-log gnome-system-monitor gnome-terminal gnome-user-guide
  gnome-user-share gstreamer1.0-clutter gucharmap gvfs-backends
  humanity-icon-theme ibus ibus-gtk3 ibus-table indicator-application
  indicator-appmenu indicator-bluetooth indicator-keyboard indicator-printers
  landscape-client-ui-install language-selector-gnome libaccount-plugin-1.0-0
  libaccount-plugin-generic-oauth libaccount-plugin-google libappindicator3-1
  libavahi-ui-gtk3-0 libbrasero-media3-1 libcanberra-gtk3-0
  libcanberra-gtk3-module libchamplain-0.12-0 libcheese-gtk23 libcheese7
  libclutter-1.0-0 libclutter-gst-2.0-0 libclutter-gst-3.0-0
  libclutter-gtk-1.0-0 libebook-1.2-16 libedata-book-1.2-25
  libedataserverui-1.2-1 libepoxy-dev libepoxy0 libevdocument3-4 libevview3-3
  libfolks-eds25 libgail-3-0 libgcr-ui-3-1 libgnome-bluetooth13
  libgnome-desktop-3-10 libgnomekbd8 libgtk-3-0 libgtk-3-bin libgtk-3-common
  libgtk-3-dev libgtkmm-3.0-1v5 libgtkmm-3.0-dev libgtksourceview-3.0-1
  libgucharmap-2-90-7 libgweather-3-6 libido3-0.1-0 libindicator3-7
  libmetacity-private3 libnautilus-extension1a libnm-gtk0 libpeas-1.0-0
  librhythmbox-core9 libtimezonemap1 libtotem0 libunity-control-center1
  libunity-core-6.0-9 libunity-gtk3-parser0 libunity-misc4
  libunity-settings-daemon1 libunity-webapps0 libvte-2.91-0 libwebkitgtk-3.0-0
  libwnck-3-0 libyelp0 light-themes mcp-account-manager-uoa mousetweaks
  nautilus nautilus-sendto nautilus-share network-manager-gnome
  network-manager-pptp-gnome notify-osd onboard onboard-data oneconf
  pinentry-gnome3 policykit-1-gnome python-aptdaemon.gtk3widgets
  python-ubuntu-sso-client python3-aptdaemon.gtk3widgets remmina
  remmina-plugin-rdp remmina-plugin-vnc rhythmbox rhythmbox-plugin-cdrecorder
  rhythmbox-plugin-magnatune rhythmbox-plugin-zeitgeist rhythmbox-plugins
  seahorse sessioninstaller shotwell simple-scan software-center
  software-properties-gtk system-config-printer-gnome telepathy-indicator
  totem totem-plugins transmission-gtk ubuntu-artwork ubuntu-desktop
  ubuntu-docs ubuntu-mono ubuntu-release-upgrader-gtk ubuntu-session
  ubuntu-sso-client ubuntu-sso-client-qt unity unity-asset-pool
  unity-control-center unity-control-center-signon unity-greeter
  unity-gtk3-module unity-lens-applications unity-scope-calculator
  unity-scope-gdrive unity-scope-manpages unity-services unity-settings-daemon
  unity-webapps-common unity-webapps-service update-manager update-notifier
  usb-creator-gtk vino xdg-user-dirs-gtk xdiagnose xorg xserver-xorg
  xserver-xorg-core xserver-xorg-input-all xserver-xorg-input-evdev
  xserver-xorg-input-mouse xserver-xorg-input-synaptics
  xserver-xorg-input-vmmouse xserver-xorg-input-wacom xserver-xorg-video-all
  xserver-xorg-video-ati xserver-xorg-video-cirrus xserver-xorg-video-fbdev
  xserver-xorg-video-intel xserver-xorg-video-mach64 xserver-xorg-video-mga
  xserver-xorg-video-neomagic xserver-xorg-video-nouveau
  xserver-xorg-video-openchrome xserver-xorg-video-qxl xserver-xorg-video-r128
  xserver-xorg-video-radeon xserver-xorg-video-savage
  xserver-xorg-video-siliconmotion xserver-xorg-video-sisusb
  xserver-xorg-video-tdfx xserver-xorg-video-trident xserver-xorg-video-vesa
  xserver-xorg-video-vmware yelp zeitgeist-datahub zenity
The following NEW packages will be installed:
  docbook-xml gcc-5-base:i386 libc6:i386 libcairo-perl libepoxy0:i386
  libgcc1:i386 libglib-perl libgtk2-perl libpango-perl librarian0
  pinentry-curses rarian-compat sgml-data
0 upgraded, 13 newly installed, 224 to remove and 0 not upgraded.
Need to get 5,835 kB of archives.
After this operation, 389 MB disk space will be freed.
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Abort.
eferreira@ubuntu:~$