llvm-toolchain-3.7 1:3.7.1-2 is marked for autoremoval from testing on 2016-10-10 It is affected by these RC bugs: 835709: llvm-toolchain-3.7: FTBFS: make[1]: gcc-6.1: Command not found 835869: llvm-toolchain-3.7: FTBFS with gcc-6