Hi, I'm trying to install graph-tool-2.2.27 from source (Debian 6.0/python 2.7.5) ./configure --prefix=${HOME}/scratch/temp/gt <snip> checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for CAIROMM... no configure: error: Package requirements (cairomm-1.0) were not met: No package 'cairomm-1.0' found </snip THIS tells me that cairomm-1.0 is not installed. I'm a bit surprised as this is marked as an optional dependency here: http://graph-tool.skewed.de/download However dpkg -L libcairomm-1.0-1 /usr/share/doc /usr/share/doc/libcairomm-1.0-1 /usr/share/doc/libcairomm-1.0-1/README /usr/share/doc/libcairomm-1.0-1/AUTHORS /usr/share/doc/libcairomm-1.0-1/copyright /usr/share/doc/libcairomm-1.0-1/changelog.Debian.gz /usr/share/doc/libcairomm-1.0-1/NEWS.gz /usr/share/doc/libcairomm-1.0-1/changelog.gz /usr/lib /usr/lib/libcairomm-1.0.so.1.4.0 /usr/lib/libcairomm-1.0.so.1 But pkg-config cairomm-1.0-1 --libs ckage cairomm-1.0-1 was not found in the pkg-config search path. Perhaps you should add the directory containing `cairomm-1.0-1.pc' to the PKG_CONFIG_PATH environment variable No package 'cairomm-1.0-1' found I suspect this is a rather simple issue. Could you please tell me how to adjust configure to find my cairomm installation? Much appreciated, Matthias