First inspect stack.yaml and change the compiler as necessary. Then run the
following commands to build things (you need stack build to get dependencies).
stack setup
stack build
stack exec -- ghcjs -O -o sharedBits -generate-base src/Lib.hs dummy/Main.hs
stack exec -- ghcjs -O -o app1 -use-base sharedBits.jsexe/out.base.symbs app1/Main.hs
stack exec -- ghcjs -O -o app2 -use-base sharedBits.jsexe/out.base.symbs app2/Main.hs
open app1.html in a browser.
If working correctly you should see a message in the console:
Hello App1!