orzel@berlioz waf/docs/book% waf build --target=waf.pdf
Waf: Entering directory `/home/orzel/clones/waf/docs/book/build'
[49/49] waf.pdf: waf.txt -> build/waf.pdf
a2x: ERROR: dblatex -t pdf -p /usr/share/asciidoc/dblatex/asciidoc-dblatex.xsl -s /usr/share/asciidoc/dblatex/asciidoc-dblatex.sty   /home/orzel/clones/waf/docs/book/build/waf.xml returned non-zero exit status 127
Waf: Leaving directory `/home/orzel/clones/waf/docs/book/build'
Build failed
 -> task failed (exit status 1):
        {task 18851408: waf.pdf waf.txt -> waf.pdf}
' /usr/bin/a2x -L -a toc --icons-dir=. --icons -D /home/orzel/clones/waf/docs/book/build -d book -f pdf ../waf.txt '
orzel@berlioz waf/docs/book%