Resolving dependencies... Configuring binary-0.7.6.1... Configuring cereal-0.5.4.0... Building cereal-0.5.4.0... Building binary-0.7.6.1... Installed binary-0.7.6.1 Configuring mtl-2.2.1... Configuring nanomsg-haskell-0.2.3... Installed cereal-0.5.4.0 Building mtl-2.2.1... Failed to install nanomsg-haskell-0.2.3 Build log ( /home/builder/.cabal/logs/nanomsg-haskell-0.2.3.log ): cabal: Entering directory '/tmp/cabal-tmp-19004/nanomsg-haskell-0.2.3' Configuring nanomsg-haskell-0.2.3... cabal: Missing dependency on a foreign library: * Missing (or bad) header file: nanomsg/nn.h * Missing C library: nanomsg This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is. If the header file does exist, it may contain errors that are caught by the C compiler at the preprocessing stage. In this case you can re-run configure with the verbosity flag -v3 to see the error messages. cabal: Leaving directory '/tmp/cabal-tmp-19004/nanomsg-haskell-0.2.3' Installed mtl-2.2.1 cabal: Error: some packages failed to install: continuum-0.1.0.6 depends on nanomsg-haskell-0.2.3 which failed to install. nanomsg-haskell-0.2.3 failed during the configure step. The exception was: ExitFailure 1