This was working just a few hours ago, and now my CI server gives: The following packages have unmet dependencies: clang-6.0 : Depends: libllvm6.0 (>= 1:6.0~svn298832-1~) but it is not going to be installed Depends: libstdc++6 (>= 4.9) but 4.8.4-2ubuntu1~14.04.4 is to be installed Depends: libstdc++-4.9-dev but it is not installable Depends: libgcc-4.9-dev but it is not installable Depends: libobjc-4.9-dev but it is not installable Depends: libclang-common-6.0-dev (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed Depends: libclang1-6.0 (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed Recommends: libomp-dev but it is not installable libclang-6.0-dev : Depends: libstdc++-4.9-dev but it is not installable Depends: libgcc-4.9-dev but it is not installable Depends: libobjc-4.9-dev but it is not installable Depends: libclang1-6.0 (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed Depends: libclang-common-6.0-dev (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed liblld-6.0 : Depends: libllvm6.0 (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed liblld-6.0-dev : Depends: lld-6.0 (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed llvm-6.0 : Depends: llvm-6.0-runtime (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed Depends: libllvm6.0 (>= 1:6.0~svn298832-1~) but it is not going to be installed Depends: libstdc++6 (>= 4.9) but 4.8.4-2ubuntu1~14.04.4 is to be installed llvm-6.0-dev : Depends: libllvm6.0 (1:6.0~svn326550-1~exp1~20180325230527.62) but it is not going to be installed Depends: libstdc++6 (>= 4.9) but 4.8.4-2ubuntu1~14.04.4 is to be installed E: Unable to correct problems, you have held broken packages. steps to reproduce: sudo sh -c 'echo "deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-6.0 main" >> /etc/apt/sources.list' wget -O - http://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test sudo apt-get update -q sudo apt-get install -y clang-6.0 libclang-6.0 libclang-6.0-dev llvm-6.0 llvm-6.0-dev liblld-6.0 liblld-6.0-dev cmake wine1.6-amd64 s3cmd -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180404/34c8c074/attachment.html>