Resolving dependencies...
Configuring hfann-0.1...
Failed to install hfann-0.1
Build log ( /home/builder/.cabal/logs/hfann-0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-20386/hfann-0.1'
Configuring hfann-0.1...
cabal: Missing dependencies on foreign libraries:
* Missing C libraries: doublefann, doublefann
This problem can usually be solved by installing the system packages that
provide these libraries (you may need the "-dev" versions). If the libraries
are already installed but in a non-standard location then you can use the
flags --extra-include-dirs= and --extra-lib-dirs= to specify where they are.
cabal: Leaving directory '/tmp/cabal-tmp-20386/hfann-0.1'
cabal: Error: some packages failed to install:
hfann-0.1 failed during the configure step. The exception was:
ExitFailure 1