$ tail -n55 /var/log/apt/history.log

Start-Date: 2016-02-09  00:32:24
Commandline: aptdaemon role='role-commit-packages' sender=':1.92'
Upgrade: libavformat-ffmpeg56:amd64 (2.7.5-0ubuntu0.15.10.1, 2.7.6-0ubuntu0.15.10.1), qml-module-qtgraphicaleffects:amd64 (5.4.2-1ubuntu2, 5.5.1-1ubuntu1~wily1~test1), libswresample-ffmpeg1:amd64 (2.7.5-0ubuntu0.15.10.1, 2.7.6-0ubuntu0.15.10.1), libepoxy0:amd64 (1.2-1, 1.3.1-1~ubuntu15.10~ppa1), google-chrome-stable:amd64 (48.0.2564.97-1, 48.0.2564.103-1), libdecoration0:amd64 (0.9.12.2+15.10.20151015-0ubuntu1, 0.9.12.2+15.10.20151202-0ubuntu1), qml-module-qtfeedback:amd64 (5.0~git20130529-0ubuntu11, 5.0~git20130529-0ubuntu12~wily1~test2), compiz-gnome:amd64 (0.9.12.2+15.10.20151015-0ubuntu1, 0.9.12.2+15.10.20151202-0ubuntu1), unity:amd64 (7.3.2+15.10.20151016-0ubuntu1, 7.3.3+15.10.20151203-0ubuntu1), qml-module-qt-labs-settings:amd64 (5.4.2-1ubuntu6, 5.5.1-2ubuntu1~wily1~test2), libunity-core-6.0-9:amd64 (7.3.2+15.10.20151016-0ubuntu1, 7.3.3+15.10.20151203-0ubuntu1), compiz-core:amd64 (0.9.12.2+15.10.20151015-0ubuntu1, 0.9.12.2+15.10.20151202-0ubuntu1), ubuntu-release-upgrader-gtk:amd64 (15.10.14.2, 15.10.14.3), libqt5feedback5:amd64 (5.0~git20130529-0ubuntu11, 5.0~git20130529-0ubuntu12~wily1~test2), libcompizconfig0:amd64 (0.9.12.2+15.10.20151015-0ubuntu1, 0.9.12.2+15.10.20151202-0ubuntu1), unity-services:amd64 (7.3.2+15.10.20151016-0ubuntu1, 7.3.3+15.10.20151203-0ubuntu1), libepoxy-dev:amd64 (1.2-1, 1.3.1-1~ubuntu15.10~ppa1), libpostproc-ffmpeg53:amd64 (2.7.5-0ubuntu0.15.10.1, 2.7.6-0ubuntu0.15.10.1), libqt5test5:amd64 (5.4.2+dfsg-2ubuntu9, 5.5.1+dfsg-1ubuntu1~wily1~test1), unity-schemas:amd64 (7.3.2+15.10.20151016-0ubuntu1, 7.3.3+15.10.20151203-0ubuntu1), libswscale-ffmpeg3:amd64 (2.7.5-0ubuntu0.15.10.1, 2.7.6-0ubuntu0.15.10.1), qtdeclarative5-qtquick2-plugin:amd64 (5.4.2-1ubuntu6, 5.5.1-2ubuntu1~wily1~test2), libqt5x11extras5:amd64 (5.4.2-2build1, 5.5.1-1), python3-distupgrade:amd64 (15.10.14.2, 15.10.14.3), qtdeclarative5-localstorage-plugin:amd64 (5.4.2-1ubuntu6, 5.5.1-2ubuntu1~wily1~test2), compiz-plugins-default:amd64 (0.9.12.2+15.10.20151015-0ubuntu1, 0.9.12.2+15.10.20151202-0ubuntu1), lightdm:amd64 (1.16.6-0ubuntu1, 1.16.7-0ubuntu1), liblightdm-gobject-1-0:amd64 (1.16.6-0ubuntu1, 1.16.7-0ubuntu1), libavcodec-extra:amd64 (2.7.5-0ubuntu0.15.10.1, 2.7.6-0ubuntu0.15.10.1), libavutil-ffmpeg54:amd64 (2.7.5-0ubuntu0.15.10.1, 2.7.6-0ubuntu0.15.10.1), ubuntu-release-upgrader-core:amd64 (15.10.14.2, 15.10.14.3), qml-module-qt-labs-folderlistmodel:amd64 (5.4.2-1ubuntu6, 5.5.1-2ubuntu1~wily1~test2), libavcodec-ffmpeg-extra56:amd64 (2.7.5-0ubuntu0.15.10.1, 2.7.6-0ubuntu0.15.10.1), qtdeclarative5-qtfeedback-plugin:amd64 (5.0~git20130529-0ubuntu11, 5.0~git20130529-0ubuntu12~wily1~test2), libgsettings-qt1:amd64 (0.1+14.10.20140807-0ubuntu6~gcc5.1, 0.1+14.10.20140807-0ubuntu6~wily1~qt551~1~gcc5.2)
End-Date: 2016-02-09  00:33:47

com.canonical.unity.webapps
In order to work properly, Unity Tweak Tool recommends you install the necessary packages

The following packages have unmet dependencies:
 unity-webapps-service : Depends: webapp-container
E: Unable to correct problems, you have held broken packages.