daporkchop@daporkchop-ThinkPad-T420:~/Desktop$ sudo dpkg -i qtwebengine5-dev_5.9.1+dfsg-4_amd64.deb
Selecting previously unselected package qtwebengine5-dev:amd64.
(Reading database ... 300626 files and directories currently installed.)
Preparing to unpack qtwebengine5-dev_5.9.1+dfsg-4_amd64.deb ...
Unpacking qtwebengine5-dev:amd64 (5.9.1+dfsg-4) ...
dpkg: dependency problems prevent configuration of qtwebengine5-dev:amd64:
 qtwebengine5-dev:amd64 depends on libqt5webchannel5-dev; however:
  Package libqt5webchannel5-dev is not installed.
 qtwebengine5-dev:amd64 depends on libqt5webengine5 (= 5.9.1+dfsg-4); however:
  Package libqt5webengine5 is not installed.
 qtwebengine5-dev:amd64 depends on libqt5webenginecore5 (= 5.9.1+dfsg-4); however:
  Package libqt5webenginecore5 is not installed.
 qtwebengine5-dev:amd64 depends on libqt5webenginewidgets5 (= 5.9.1+dfsg-4); however:
  Package libqt5webenginewidgets5 is not installed.
 qtwebengine5-dev:amd64 depends on qtdeclarative5-dev; however:
  Package qtdeclarative5-dev is not installed.
 qtwebengine5-dev:amd64 depends on qtpositioning5-dev; however:
  Package qtpositioning5-dev is not installed.
 qtwebengine5-dev:amd64 depends on libqt5core5a (>= 5.9.0~beta); however:
  Version of libqt5core5a:amd64 on system is 5.5.1+dfsg-16ubuntu7.5.

dpkg: error processing package qtwebengine5-dev:amd64 (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 qtwebengine5-dev:amd64
daporkchop@daporkchop-ThinkPad-T420:~/Desktop$