(/usr/local/share/texmf-dist/tex/latex/tipa/t3enc.def
(/usr/local/share/texmf-dist/tex/latex/euenc/eu1lmss.fd)))
kpathsea:make_tex: Invalid fontname `DejaVu Sans', contains ' '
(/usr/local/share/texmf-dist/tex/latex/fontspec/fontspec.cfg)))

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! 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.21 \setsansfont{DejaVu Sans}
                              
? 
! Emergency stop.
!...............................................  
                                                  
l.21 \setsansfont{DejaVu Sans}
                              
No pages of output.
Transcript written on users_guide.log.
docs/users_guide/ghc.mk:18: recipe for target 'docs/users_guide/users_guide.pdf' failed
gmake[1]: *** [docs/users_guide/users_guide.pdf] Error 1
Makefile:121: recipe for target 'all' failed
gmake: *** [all] Error 2