py25-pygraphviz build fails on snow leopard

[andrzej.sliwa@…]

sudo port install py25-pygraphviz haves errors:

--->  Computing dependencies for py25-pygraphviz
--->  Building py25-pygraphviz
Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_python_py25-pygraphviz/work/pygraphviz-0.99" && /opt/local/bin/python2.5 setup.py --no-user-cfg build " returned error 1
Command output: Package libagraph was not found in the pkg-config search path.
Perhaps you should add the directory containing `libagraph.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libagraph' found
Package libagraph was not found in the pkg-config search path.
Perhaps you should add the directory containing `libagraph.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libagraph' found
Trying pkg-config
Trying dotneato-config
Failed to find dotneato-config

Your graphviz installation could not be found.

Either the graphviz package is missing on incomplete
(binary packages graphviz-dev or graphviz-devel missing?).  

If you think your installation is correct you will need to manually
change the include_path and library_path variables in setup.py to
point to the correct locations of your graphviz installation.

The current setting of library_path and include_path is:
library_path=None
include_path=None

Traceback (most recent call last):
  File "setup.py", line 120, in <module>
    raise OSError,"Error locating graphviz."
OSError: Error locating graphviz.

Error: Status 1 encountered during processing.

[blb@…]

Updated to version 0.99.1 in r57409 which fixes this issue.