I got past my first problem (see https://ghc.haskell.org/trac/ghc/ticket/11823#comment:13 for the resolution) but now I have the following problem building the doc (on a Mac) .

It seems like it doesn't like font names with spaces, not sure why (or if!) this would be Mac specific:

       Invalid fontname `DejaVu Sans', contains ' '

longer extract from the output:

copying static files... This is XeTeX, Version 3.14159265-2.6-0.99992 (TeX Live 2015) (preloaded format=xelatex)
 restricted \write18 enabled.
entering extended mode
(./users_guide.tex
LaTeX2e <2015/01/01>
Babel <3.9l> and hyphenation patterns for 79 languages loaded.
(./sphinxmanual.cls
Document Class: sphinxmanual 2009/06/02 Document class (Sphinx manual)
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/report.cls
Document Class: report 2014/09/29 v1.4h Standard LaTeX document class
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/size10.clodone
copying extra files... done
dumping search index in English (code: en) ... )))
(/usr/local/texlive/2015/texmf-dist/tex/latex/cmap/cmap.sty

Package cmap Warning: pdftex not detected - exiting.

)done
dumping object inventory...  (/usr/local/texlive/2015/texmf-dist/tex/latex/base/fontenc.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/t1enc.defdone
build succeeded, 25 warnings.
))
(/usr/local/texlive/2015/texmf-dist/tex/generic/babel/babel.sty
(/usr/local/texlive/2015/texmf-dist/tex/generic/babel-english/english.ldf
(/usr/local/texlive/2015/texmf-dist/tex/generic/babel/babel.def
(/usr/local/texlive/2015/texmf-dist/tex/generic/babel/xebabel.def))))
(/usr/local/texlive/2015/texmf-dist/tex/latex/psnfss/times.sty) (./fncychap.sty
) (/usr/local/texlive/2015/texmf-dist/tex/latex/tools/longtable.sty)
(./sphinx.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/fancyhdr/fancyhdr.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/textcomp.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/ts1enc.def))
(/usr/local/texlive/2015/texmf-dist/tex/latex/fancybox/fancybox.sty
Style option: `fancybox' v1.4 <2010/05/15> (tvz)
) (/usr/local/texlive/2015/texmf-dist/tex/latex/titlesec/titlesec.sty)
(./tabulary.sty (/usr/local/texlive/2015/texmf-dist/tex/latex/tools/array.sty))
 (/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amstext.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsgen.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsbsy.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/amsmath/amsopn.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/makeidx.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/framed/framed.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/ifthen.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/color.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/latexconfig/color.cfg)
(/usr/local/texlive/2015/texmf-dist/tex/xelatex/xetex-def/xetex.def))
(/usr/local/texlive/2015/texmf-dist/tex/latex/fancyvrb/fancyvrb.sty
Style option: `fancyvrb' v2.7a, with DG/SPQR fixes, and firstline=lastline fix 
<2008/02/07> (tvz)
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/keyval.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/threeparttable/threeparttable.sty
) (/usr/local/texlive/2015/texmf-dist/tex/latex/mdwtools/footnote.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/wrapfig/wrapfig.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/parskip/parskip.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/alltt.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/upquote/upquote.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/graphicx.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/graphics.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/graphics/trig.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/latexconfig/graphics.cfg)))
(/usr/local/texlive/2015/texmf-dist/tex/latex/hyperref/hyperref.sty
(/usr/local/texlive/2015/texmf-dist/tex/generic/oberdiek/hobsub-hyperref.sty
(/usr/local/texlive/2015/texmf-dist/tex/generic/oberdiek/hobsub-generic.sty))
(/usr/local/texlive/2015/texmf-dist/tex/generic/ifxetex/ifxetex.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/oberdiek/auxhook.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/oberdiek/kvoptions.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/hyperref/pd1enc.def)
(/usr/local/texlive/2015/texmf-dist/tex/latex/latexconfig/hyperref.cfg)
(/usr/local/texlive/2015/texmf-dist/tex/latex/url/url.sty))

Package hyperref Message: Driver (autodetected): hxetex.

(/usr/local/texlive/2015/texmf-dist/tex/latex/hyperref/hxetex.def
(/usr/local/texlive/2015/texmf-dist/tex/latex/hyperref/puenc.def)
(/usr/local/texlive/2015/texmf-dist/tex/generic/oberdiek/stringenc.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/oberdiek/rerunfilecheck.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/oberdiek/hypcap.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/caption/newfloat.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/capt-of/capt-of.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/needspace/needspace.sty))
(/usr/local/texlive/2015/texmf-dist/tex/latex/multirow/multirow.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/eqparbox/eqparbox.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/environ/environ.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/trimspaces/trimspaces.sty)))
(/usr/local/texlive/2015/texmf-dist/tex/latex/fontspec/fontspec.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/l3kernel/expl3.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/l3kernel/expl3-code.tex)
(/usr/local/texlive/2015/texmf-dist/tex/latex/l3kernel/l3unicode-data.def)
(/usr/local/texlive/2015/texmf-dist/tex/latex/l3kernel/l3xdvipdfmx.def))
(/usr/local/texlive/2015/texmf-dist/tex/latex/l3packages/xparse/xparse.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/fontspec/fontspec-patches.sty)
(/usr/local/texlive/2015/texmf-dist/tex/latex/fontspec/fontspec-xetex.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/base/fontenc.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/euenc/eu1enc.def)
(/usr/local/texlive/2015/texmf-dist/tex/latex/euenc/eu1lmr.fd))
(/usr/local/texlive/2015/texmf-dist/tex/xelatex/xunicode/xunicode.sty
(/usr/local/texlive/2015/texmf-dist/tex/latex/tipa/t3enc.def
(/usr/local/texlive/2015/texmf-dist/tex/latex/euenc/eu1lmss.fd)))
(/usr/local/texlive/2015/texmf-dist/tex/latex/fontspec/fontspec.cfg)))kpathsea:make_tex: . 


!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! fontspec error: "font-not-found"
! The font "DejaVu Sans" cannot be found.
! See the fontspec documentation for further information.
! For immediate help type H <return>.
!...............................................  
                                                  
l.23 \setsansfont{DejaVu Sans}
                              

On Sun, Apr 10, 2016 at 12:05 PM Ben Gamari <ben@well-typed.com> wrote:
tl;dr: If you would like to produce a binary distribution for GHC
       8.0.1-rc3 then let us know, grab the source distribution and
       start building. The binary distributions will be all released one
       week from today.


Hello GHC packagers,

Austin and I are happy to announce the release of the 8.0.1-rc3 source
distribution to binary packagers. You will find the tarball and usual
assortment of signatures at

    http://downloads.haskell.org/~ghc/8.0.1-rc3/

This release is the first where we are following our new release policy
[1], where a one-week delay will be introduced between the release of
the source and binary distributions. The goal of this policy is to give
all platforms the opportunity for support from the first day of a
release.

If all of the expected binary releases are submitted before the
week-long delay is through, we can move forward with the release ahead
of schedule. Given how late release candidate 3 is, we'd naturally like
to get the binary releases out as soon is possible: The sooner we can
get this -rc out the door the sooner we can get to the final release.
Moreover, it would be appreciated if you could confirm that you intend
to offer a binary distribution this release.

Otherwise, let either Austin or I know if you have any trouble building
your distribution. I have yet to push the 8.0.1-rc3 tag in case we
encounter unexpected issues but all of my builds with this tarball
thusfar have gone quite well.

Good luck and thanks for all of your work!

Cheers,

- Ben


[1] https://mail.haskell.org/pipermail/ghc-devs/2016-March/011546.html
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