- https://www.haskell.org/ghc/
- on debian: apt-get install ghc
- http://hackage.haskell.org/package/cabal-install
- on debian: apt-get install cabal-install
- on debian: apt-get install zlib1g zlib1g-dev
- cabal update
- cabal install dbus
- cabal update
- cabal install command
- cabal update
- cabal install concurrent-extra
- make
- sudo make install
- systemctl --user daemon-reload
- systemctl --user enable scd_locker
- systemctl --user start scd_locker