Hi, I tried to install the graph-tool .deb package in debian squeeze from the following repository deb http://downloads.skewed.de/apt/squeeze squeeze main but I cannot solve a libcairomm.10 dependency: The following packages have unmet dependencies: graph-tool : Depends: libcairomm-1.0 but it is not installable However, I do have installed the appropriate debian packages which should satisfy the dependency: libcairomm-1.0-1 - C++ wrappers for Cairo (shared libraries) libcairomm-1.0-dev - C++ wrappers for Cairo (development files) The package dependencies are listed as: Depends: libboost-iostreams1.42.0 (>= 1.42.0-1), libboost-python1.42.0 (>= 1.42.0-1), libboost-regex1.42.0 (>= 1.42.0-1), libc6 (>= 2.2.5), libcairo2 (>= 1.2.4), libcairomm-1.0-1 (>= 1.6.4), libcgal5, libexpat1 (>= 1.95.8), libfontconfig1 (>= 2.8.0), libfreetype6 (>= 2.2.1), libgcc1 (>= 1:4.1.1), libgmp3c2, libgomp1 (>= 4.2.1), libpng12-0 (>= 1.2.13-4), libpython2.6 (>= 2.6), libsigc++-2.0-0c2a (>= 2.0.2), libstdc++6 (>= 4.4.0), libx11-6, zlib1g (>= 1:1.1.4), python-dev, python-scipy, libgv-python, g++-4.4, libboost1.42-dev, expat, python-matplotlib, libcairomm-1.0, python-cairo Among which are libcairomm-1.0-1 (which is installed) and libcairomm-1.0 (that is not installed). What are the differences between these two packages? For the record, I did install previous versions of graph-tool in debian squeeze. Thanks, Rodrigo