Does the 'stage=2' setting not work anymore in build.mk?

[Edward Z. Yang]

are-validating.mk flips GHC tree into "validating mode", which makes
it ignore mk/build.mk. Remember to delete it when you are done
validating.

Edward

Excerpts from Dr. ERDI Gergo's message of 2014-08-29 13:14:04 +0100:
> On Fri, 29 Aug 2014, Edward Z. Yang wrote:
> 
> > OK, it's definitely worked for me in that time.  Do you have
> > mk/are-validating.mk in your tree? Also do try on a fresh working copy.
> 
> Yes I do! Is that the remnant of some failed validation process? Should I 
> remove it?