freebsd-amd64-head (FreeBSD/amd64 HEAD), build 219, Failure

[Builder]

freebsd-amd64-head (FreeBSD/amd64 HEAD), build 219

Build failed
Details: http://haskell.inf.elte.hu/builders/freebsd-amd64-head/219.html

git clone                    | Success
create mk/build.mk           | Success
get subrepos                 | Success
repo versions                | Success
touching clean-check files   | Success
setting version date         | Success
booting                      | Success
configuring                  | Success
creating check-remove-before | Success
compiling                    | Failure: Just (ExitFailure 2)

Build failed
Details: http://haskell.inf.elte.hu/builders/freebsd-amd64-head/219.html

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"rm" -rf utils/haddock/doc/haddock/  
"/usr/local/bin/xsltproc" --stringparam base.dir utils/haddock/doc/haddock/ --stringparam use.id.as.filename 1 --stringparam html.stylesheet fptools.css --nonet --stringparam toc.section.depth 3 --stringparam section.autolabel 1 --stringparam section.label.includes.component.label 1  http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl utils/haddock/doc/haddock.xml
Writing utils/haddock/doc/haddock/license.html for section(license)
Writing utils/haddock/doc/haddock/ch01s03.html for section
Writing utils/haddock/doc/haddock/ch01s04.html for section
Writing utils/haddock/doc/haddock/introduction.html for chapter(introduction)
Writing utils/haddock/doc/haddock/invoking.html for chapter(invoking)
Writing utils/haddock/doc/haddock/ch03s02.html for section
Writing utils/haddock/doc/haddock/ch03s03.html for section
Writing utils/haddock/doc/haddock/ch03s04.html for section
Writing utils/haddock/doc/haddock/ch03s05.html for section
Writing utils/haddock/doc/haddock/hyperlinking.html for section(hyperlinking)
Writing utils/haddock/doc/haddock/module-attributes.html for section(module-attributes)
Writing utils/haddock/doc/haddock/ch03s08.html for section
Writing utils/haddock/doc/haddock/markup.html for chapter(markup)
Writing utils/haddock/doc/haddock/ix01.html for index
Writing utils/haddock/doc/haddock/index.html for book(haddock)
cp mk/fptools.css utils/haddock/doc/haddock/
"/usr/local/bin/dblatex" -P 'filename.as.url=0' utils/haddock/doc/haddock.xml --ps -o utils/haddock/doc/haddock.ps
env: python: No such file or directory
gmake[1]: *** [utils/haddock/doc/haddock.ps] Error 127
gmake: *** [all] Error 2