=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for roman-1.4.0.tar.gz
=> Checksum RMD160 OK for roman-1.4.0.tar.gz
===> Installing dependencies for py26-roman-1.4.0
==========================================================================
The following variables will affect the build process of this package,
py26-roman-1.4.0.  Their current value is shown below:

        * PYTHON_VERSION_DEFAULT = 27

Based on these variables, the following variables have been set:

        * PYPACKAGE = python26

You may want to abort the process now with CTRL-C and change their value
before continuing.  Be sure to run `/usr/bin/make clean' after
the changes.
==========================================================================
=> Tool dependency checkperms>=1.1: found checkperms-1.11
=> Full dependency py26-setuptools>=0.6c9: found py26-setuptools-0.6c11nb1
=> Full dependency python26>=2.6.6nb8: found python26-2.6.8nb3
===> Overriding tools for py27-roman-1.4.0
===> Extracting for py27-roman-1.4.0
===> Patching for py27-roman-1.4.0
=> Applying pkgsrc patches for py27-roman-1.4.0
=> Verifying /usr/pkgsrc/math/py-roman/patches/patch-src_roman.py
=> Applying pkgsrc patch /usr/pkgsrc/math/py-roman/patches/patch-src_roman.py
Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|$NetBSD: patch-src_roman.py,v 1.2 2012/08/15 17:18:15 drochner Exp $
|
|* replace deprecated operator `<>' with `!='
|* use 3.x compatible exception syntax
|
|--- src/roman.py.orig	2009-07-23 16:34:18.000000000 +0000
|+++ src/roman.py
--------------------------
Patching file src/roman.py using Plan A...
Hunk #1 succeeded at 40.
Hunk #2 succeeded at 67.
done
===> Creating toolchain wrappers for py27-roman-1.4.0
ERROR: python27>=2.7 python27>=2.7 is not installed; can't buildlink files.
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/math/py-roman
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/math/py-roman