on RedHat 7.0 Postgres 7.0.2 in /usr/postgres (from the source .gz) Zope 2.3.0 in /home/zope (from the source .gz) when I run ./configure I get: checking for python... /usr/bin/python checking python version... 1.5 checking python installation prefix... /usr checking python installation exec_prefix... /usr checking definitions in Python library makefile... sed: can't read /usr/lib/python1.5/config/Makefile: No such file or directory done checking for install... /usr/bin/install checking location of python library... $(prefix)/lib/python1.5/site-packages checking location of python shared modules... $(exec_prefix)/lib/python1.5/site-packages checking for PQconnectStart in -lpq... no configure: error: can't build without PostgreSQL libraries ./configure --with-python=/home/zope/bin/python --with-postgres-libraries=/u sr/postgres/lib --with-post gres-includes=/usr/postgres/include and some other combinations without effect. I am a bit confused, because I can't remember a problem on my previous installation on RedHat 6.2. Do I have to build the /usr/lib/python1.5/config/Makefile somehow? why are the PostgreSQL Libraries not found? Any clues? Thanks in advance!