Installation fails at configure

[ZmjbS]

I'm attempting to install touchegg and geis is one of the requirements. Unfortunately the process fails during config with the message:

No package 'python3' found

This happens both through emerge (from the Gentoo Portage overlay named 'trash') and when downloading the source (version 2.2.16) and running

./configure -n

Python 3.3 is installed and, according to config.log, is detected:

configure:4489: checking for a Python interpreter with version >= 3.2
configure:4506: python -c import sys # split strings by '.' and convert to numeric. Append some zeros # because we need at least 4 digits for the hex conversion. # map returns an iterator in Python 3.0 and a list in 2.x minver = list(map(int, '3.2'.split('.'))) + [0, 0, 0] minverhex = 0 # xrange is not present in Python 3.0 and range returns an iterator for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[i] sys.exit(sys.hexversion < minverhex)
configure:4509: $? = 0
configure:4515: result: python
configure:4523: checking for python
configure:4541: found /usr/bin/python
configure:4553: result: /usr/bin/python
configure:4571: checking for python version
configure:4578: result: 3.3
configure:4590: checking for python platform
configure:4597: result: linux
configure:4604: checking for python script directory
configure:4632: result: ${prefix}/lib/python3.3/site-packages
configure:4641: checking for python extension module directory
configure:4669: result: ${exec_prefix}/lib/python3.3/site-packages