install scala and sbt

# Remove the existing scala in your system

sudo apt-get remove scala-library scala

# Download and install scala-2.12.4

wget www.scala-lang.org/files/archive/scala-2.12.4.deb

sudo dpkg -i scala-2.12.4.deb

sudo apt-get update

sudo apt-get install scala

# Download and install the latest sbt

echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823

sudo apt-get update

sudo apt-get install sbt