Comment 2 for bug 344049

I get the following error during build:

...
Making install in doc
make[2]: Entering directory `/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/build/main/doc'
Making install in reference
make[3]: Entering directory `/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/build/main/doc/reference'
make[4]: Entering directory `/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/build/main/doc/reference'
make[4]: Nothing to be done for `install-exec-am'.
installfiles=`echo /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/*`; \
 if test "$installfiles" = '/home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/*'; \
 then echo '-- Nothing to install' ; \
 else \
   if test -n ""; then \
     installdir="/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/tmp/main/usr/share/gtk-doc/html/vte-"; \
   else \
     installdir="/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/tmp/main/usr/share/gtk-doc/html/vte"; \
   fi; \
   /bin/sh /home/egon/warthogs/vte/build-area/vte-0.20.0/./mkinstalldirs ${installdir} ; \
   for i in $installfiles; do \
     echo '-- Installing '$i ; \
     /usr/bin/install -c -m 644 $i ${installdir}; \
   done; \
   if test -n ""; then \
     mv -f ${installdir}/vte.devhelp2 \
       ${installdir}/vte-.devhelp2; \
     mv -f ${installdir}/vte.devhelp \
       ${installdir}/vte-.devhelp; \
   fi; \
    --relative --dest-dir=/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/tmp/main --html-dir=${installdir}; \
 fi
mkdir -p -- /home/egon/warthogs/vte/build-area/vte-0.20.0/debian/tmp/main/usr/share/gtk-doc/html/vte
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/ch01.html
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/home.png
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/index.html
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/index.sgml
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/left.png
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/right.png
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/style.css
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/up.png
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/vte.devhelp
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/vte.devhelp2
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/VteTerminalAccessible.html
-- Installing /home/egon/warthogs/vte/build-area/vte-0.20.0/./doc/reference/html/VteTerminal.html
/bin/sh: line 20: --relative: command not found
make[4]: *** [install-data-local] Error 127
make[4]: Leaving directory `/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/build/main/doc/reference'
make[3]: *** [install-am] Error 2
make[3]: Leaving directory `/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/build/main/doc/reference'
make[2]: *** [install-recursive] Error 1
make[2]: Leaving directory `/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/build/main/doc'
make[1]: *** [install-recursive] Error 1
make[1]: Leaving directory `/home/egon/warthogs/vte/build-area/vte-0.20.0/debian/build/main'
make: *** [common-install-impl] Error 2