distclean crashes

[Simon Peyton-Jones]

| This is a little odd. What's happening is that cabal-bin doesn't know
| how to build the ghc-prim package, so it compiles and uses Setup.hs
| instead. So when you ask it to clean the package, it builds Setup and
| does "./Setup clean".

Is this really a good thing?  That make clean requires serious building?

| Ah, I think that the problem is that you have setup directories left
| over from a previous build.
|
|     rm -rf libraries/*/setup/
|
| should sort that out, and they are no longer created.

couldn't make distclean do this for itself?

Simon