http://packages.ros.org/ros-shadow-fixed/ubuntu/dists/precise/main/binary-amd64/Packages tells python-rosdep is depends on python 2.6, not 2.7 . Is it correct? Packages file in ros/ubuntu seems correct one. Package: python-rosdep Source: rosdep Version: 0.10.30-1 Architecture: all Maintainer: Tully Foote, Ken Conley Installed-Size: 356 Depends: python (<< 2.7), python (>= 2.6), python-support (>= 0.90.0), python-yaml (>= 3.1) Provides: python2.6-rosdep Priority: optional Section: python Filename: pool/main/r/rosdep/python-rosdep_0.10.30-1_all.deb Size: 49998 SHA256: 9eb2626a37c33270bbdcc3a14bf3d66f8937b751285b9ecb0e589778591f887b SHA1: 4ce7fc227f4f9ff7a0eeb23599aab2be27fecf1d MD5sum: b62ff9892e7654ffd96827b3b6b3a6e4 Description: rosdep package manager abstrction tool for ROS Command-line tool for installing system dependencies on a variety of platforms. Python-Version: 2.6 _______________________________________________ ros-release mailing list ros-release@code.ros.org http://lists.ros.org/mailman/listinfo/ros-release