Can't install mkchromecast

I'm trying to install mkchromecast . Following the instructions on the website, I first tried: $ sudo apt-get install mkchromecast Which returned: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package mkchromecast When this didn't work, I downloaded the .deb and tried this: $ sudo dpkg -i mkchromecast_0.3.6-3_all.deb and got the following response: Selecting previously unselected package mkchromecast. (Reading database ... 244586 files and directories currently installed.) Preparing to unpack mkchromecast_0.3.6-3_all.deb ... Unpacking mkchromecast (0.3.6-3) ... dpkg: dependency problems prevent configuration of mkchromecast: mkchromecast depends on python-flask; however: Package python-flask is not installed. mkchromecast depends on python-pychromecast; however: Package python-pychromecast is not installed. mkchromecast depends on python-psutil; however: Package python-psutil is not installed. mkchromecast depends on vorbis-tools (>= 1.4.0); however: Package vorbis-tools is not installed. mkchromecast depends on lame (>= 3.99.0); however: Package lame is not installed. mkchromecast depends on flac (>= 1.3.0); however: Package flac is not installed. mkchromecast depends on python-pyqt5; however: Package python-pyqt5 is not installed. mkchromecast depends on youtube-dl; however: Package youtube-dl is not installed. dpkg: error processing package mkchromecast (--install): dependency problems - leaving unconfigured Processing triggers for desktop-file-utils (0.22-1ubuntu5.1) ... Processing triggers for gnome-menus (3.13.3-6ubuntu3.1) ... Processing triggers for mime-support (3.59ubuntu1) ... Processing triggers for man-db (2.7.5-1) ... Errors were encountered while processing: mkchromecast A few Google searches led me to try: sudo gdebi mkchromecast_0.3.6-3_all.deb Which returned: Reading package lists... Done Building dependency tree Reading state information... Done Reading state information... Done This package is uninstallable Dependency is not satisfiable: python-pychromecast So I downloaded the python-pychromecast.deb and: sudo gdebi python-pychromecast_0.7.7-2_all.deb But it seems the right version of python-protobuf is not installed: Reading package lists... Done Building dependency tree Reading state information... Done Reading state information... Done This package is uninstallable Dependency is not satisfiable: python-protobuf (>= 3) However, if I run: sudo apt-get install python-protobuf It tells me it already is on the newest version: Reading package lists... Done Building dependency tree Reading state information... Done python-protobuf is already the newest version (2.6.1-1.3). 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Therefore I forced an install of the right version with: sudo -H pip install --upgrade protobuf==3.2.0 But this gives this response: Requirement already up-to-date: protobuf==3.2.0 in /usr/local/lib/python2.7/dist-packages/protobuf-3.2.0-py2.7.egg Requirement already up-to-date: six>=1.9 in /usr/lib/python2.7/dist-packages (from protobuf==3.2.0) Requirement already up-to-date: setuptools in /usr/local/lib/python2.7/dist-packages (from protobuf==3.2.0) Requirement already up-to-date: appdirs>=1.4.0 in /usr/local/lib/python2.7/dist-packages (from setuptools->protobuf==3.2.0) Requirement already up-to-date: packaging>=16.8 in /usr/local/lib/python2.7/dist-packages (from setuptools->protobuf==3.2.0) Requirement already up-to-date: pyparsing in /usr/local/lib/python2.7/dist-packages (from packaging>=16.8->setuptools->protobuf==3.2.0) Which leads me to believe version >= 3 should be installed... Can anyone tell me what I'm doing wrong?