After signing up in heroku and downloaded the heroku command line tools and the git tools, you must have your application in a local git repository and your command shell must be located where the .git directory is. Your application must have a cabal file, and the file called ProcFile must contain the following:
> cat ProcFile
Then create the heroku instance name and push it to heroku with these two commands, using anvil:
Don´t do it under Windows. It does not work!! Don´t spend a month trying it like me thinking that I am stupid!. Anvil currently does not work in Windows.
>heroku create myinstancename
>heroku plugins:install https://github.com/ddollar/heroku-anvil
>heroku build -r -b https://github.com/agocorona/heroku-buildpack-haskell.git