"cabal help" can report incorrect configuration file when "--config-file" option used.

[ecyrb]

cabal help says:

You can edit the cabal configuration file to set defaults:
  <user's home dir?>/.cabal/config

regardless of the value of --config-file. If something has aliased your cabal command, this can be confusing (though yes, I admit this is the user's fault).

[23Skidoo]

Config file location can be also set via the CABAL_CONFIG environment variable.

[ulysses4ever]

I don't think there's a need to change the help message depending on the flag: if one uses the file, they probably know that they need to edit the corresponding file. The only way to improve I see is to make the message a bit more general maybe. E.g. "You can edit the default cabal configuration..." or something like that.

[jneira]

another alternative could be print the location of the actual config file, wherever it is set