Reproducer for ndmitchell/ghcid#191

Install ghcid/stack (via https://devenv.sh/getting-started/ and devenv shell or otherwise).

Run stack build.

In separate terminals run:

$ ghcid --target myprogram:exe:myprogram --test Main.main
$ tail -f log.txt

Once you touch src/Main.hs, ghcid will reload and in log.txt you'll see two timestamps being added.