ObjectIO install

[Andre W B Furtado]

The INSTALL file that comes with the objectIO files says that one must use
the following commands to register the package:

$ ghc-pkg -r objectio
$ ghc-pkg -a objectio -f pckg.cfg

The second command is not recognized as a valid one, and the ghc-pkg help
appears showing the correct syntax. I needed to use

$ ghc-pkg -a < pckg.cfg

in order to get the package correctly registered. Am I missing something or
is the INSTALL file wrong?

-- Andre