Resolving dependencies... Downloading botan-bindings-0.2.0.0 Downloaded botan-bindings-0.2.0.0 Configuring botan-bindings-0.2.0.0... Error: cabal: Missing dependency on a foreign library: * Missing (or bad) header file: botan/ffi.h * Missing (or bad) C library: botan-3 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 library 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. 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. Failed to install botan-bindings-0.2.0.0 Error: cabal: Some packages failed to install: botan-bindings-0.2.0.0-6j0nS0ReCH835pdHwyVhpU failed during the configure step. The exception was: ExitFailure 1