How do you build the haddocks for a boot library?

[Simon Jakobi]

Hi,

I have some changes to the haddocks in ghc-prim which are re-exported
from base. In order to check that I got the syntax right I've tried to
build the haddocks by following
https://ghc.haskell.org/trac/ghc/wiki/Building/Docs#Haddockdocumentation.

Sadly, when I run "make html" in libraries/ghc-prim or libraries/base
I get the following error:

    GNUmakefile:3: libraries/ghc-prim/mk/sub-makefile.mk: No such file
or directory
    make: *** No rule to make target
'libraries/ghc-prim/mk/sub-makefile.mk'. Stop.

What should I do instead?

Cheers,
Simon