Hi Ben, it seems the story is not over yet. For some reason, building out-of-tree libraries (like mtl) does not build .so files on arm*: https://buildd.debian.org/status/fetch.php?pkg=haskell-mtl&arch=armhf&ver=2.1.3.1-1&stamp=1418087332 which later causes breakage: [1 of 1] Compiling Data.Binary.Shared ( src/Data/Binary/Shared.hs, dist-ghc/build/Data/Binary/Shared.o ) [1 of 1] Compiling Data.Binary.Shared ( src/Data/Binary/Shared.hs, dist-ghc/build/Data/Binary/Shared.p_o ) https://buildd.debian.org/status/fetch.php?pkg=haskell-binary-shared&arch=armhf&ver=0.8.3-2&stamp=1419258130 Do you have any rough guesses what might be causing this? Greetings, Joachim -- Joachim “nomeata” Breitner mail@joachim-breitner.de • http://www.joachim-breitner.de/ Jabber: nomeata@joachim-breitner.de • GPG-Key: 0xF0FBF51F Debian Developer: nomeata@debian.org