varunwachaspati@GreyMatter:~$ sudo apt-get install --reinstall gnome-screenshot
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  browser-plugin-gnash caribou caribou-antler fonts-cantarell gdebi gdebi-core
  gir1.2-accountsservice-1.0 gir1.2-caribou-1.0 gir1.2-gck-1 gir1.2-gcr-3
  gir1.2-gdm-1.0 gir1.2-gkbd-3.0 gir1.2-grilo-0.2 gir1.2-mediaart-1.0
  gir1.2-mutter-3.0 gir1.2-networkmanager-1.0 gir1.2-nmgtk-1.0
  gir1.2-polkit-1.0 gir1.2-rest-0.7 gir1.2-telepathyglib-0.12
  gir1.2-telepathylogger-0.2 gir1.2-tracker-1.0 gir1.2-upowerglib-1.0
  gir1.2-xkl-1.0 gir1.2-zpj-0.0 gjs gnash gnash-common gnome-backgrounds
  gnome-control-center-data gnome-dictionary gnome-documents
  gnome-icon-theme-extras gnome-nettool gnome-online-accounts
  gnome-online-miners gnome-packagekit-data gtk2-engines hamster-applet
  hamster-indicator libboost-program-options1.55.0 libcaribou-common
  libcaribou-gtk-module libcaribou-gtk3-module libcaribou0 libdiscid0
  libgdict-1.0-8 libgdict-common libgdm1 libgfbgraph-0.2-0
  libgoa-backend-1.0-1 libidl0 libjemalloc1 libmediaart-1.0-0 liborbit2
  librygel-core-2.6-2 librygel-renderer-2.6-2 librygel-renderer-gst-2.6-2
  librygel-server-2.6-2 libsofia-sip-ua-glib3 libsofia-sip-ua0 libwnck-common
  libwnck22 libzapojit-0.0-0 python-gnome2 python-pyatspi python-pyorbit
  python-wnck realmd rygel rygel-playbin rygel-preferences sound-juicer
  telepathy-rakia unoconv
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 1 not upgraded.
Need to get 0 B/162 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 470218 files and directories currently installed.)
Preparing to unpack .../gnome-screenshot_3.16.2-0ubuntu1~vivid1_amd64.deb ...
Unpacking gnome-screenshot (3.16.2-0ubuntu1~vivid1) over (3.16.2-0ubuntu1~vivid1) ...
Processing triggers for libglib2.0-0:amd64 (2.44.1-1ubuntu1) ...
No such key 'external-editor' in schema 'org.gnome.eog.ui' as specified in override file '/usr/share/glib-2.0/schemas/10_ubuntu-settings.gschema.override'; ignoring override for this key.
Processing triggers for libglib2.0-0:i386 (2.44.1-1ubuntu1) ...
No such key 'external-editor' in schema 'org.gnome.eog.ui' as specified in override file '/usr/share/glib-2.0/schemas/10_ubuntu-settings.gschema.override'; ignoring override for this key.
Processing triggers for gconf2 (3.2.6-3ubuntu1) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu5) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu3) ...
Processing triggers for bamfdaemon (0.5.1+15.04.20150202-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.58ubuntu1) ...
Setting up gnome-screenshot (3.16.2-0ubuntu1~vivid1) ...