py*-goocanvas: build failure on build bots

[dbevans (David B. Evans)]

Builds of this port are currently failing on the build bots with this error

make[2]: Entering directory `/opt/local/var/macports/build/_opt_macports_trunk_dports_python_py-goocanvas/py27-goocanvas/work/pygoocanvas-0.14.1/docs'
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 -c 'import datetime; print datetime.date.today()' > reference/builddate.xml
xsltproc --nonet --xinclude -o ../docs/html/ \
		 --path ../docs/reference:./reference \
				 --stringparam gtkdoc.bookname "pygoocanvas" \
				 --stringparam gtkdoc.version . \
				 /opt/local/Library/Frameworks/Python.framework/Versions/2.7/share/pygobject/xsl/ref-html-style.xsl ./reference/pygoocanvas-ref.xml
I/O error : Attempt to load network entity http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl
warning: failed to load external entity "http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl"
compilation error: file /opt/local/Library/Frameworks/Python.framework/Versions/2.7/share/pygobject/xsl/ref-html-style.xsl line 4 element import
xsl:import : unable to load http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl

which appears to be due to a missing dependency although docbook-xsl which seems to provide the required file is listed as a build dependency.

Full build log attached

[dbevans (David B. Evans)]

Build log showing failure

[dbevans (David B. Evans)]

By "appears to be due to a missing dependency" I mean that the port builds properly when I build on my system with my normal set of ports installed but fails on the build bots. Can be replicated locally by doing the following to simulate the build bot environment

sudo port deactivate active
sudo port install py27-goocanvas

[dbevans (David B. Evans)]

Build dependencies updated (missing gtk-doc) in r116708, maintainer timeout. Build on bots now successful.