setup clean in 6.4 Cabal

[Serge D. Mechveliani]

The Cabal documentation for ghc-6.4 writes

 3.8. setup clean   ... configure or build steps


Does this mean the command  runghc Setup.hs clean
?
I run such, and it cleans  dist/*.
All right.
Now, what is a similar easy command for un-installing  
(remove .../lib/*) ?                           
Currently, I apply     rm -rf $(myPackageInstallDir)/*,

but, maybe, there should be something similar to the `clean' command? 

-----------------
Serge Mechveliani
mechvel at botik.ru