Resolving dependencies...
Configuring proj4-hs-bindings-0.1...
Building proj4-hs-bindings-0.1...
Preprocessing library proj4-hs-bindings-0.1...
[1 of 2] Compiling Geo.Proj4.Internal ( src/Geo/Proj4/Internal.hs, dist/build/Geo/Proj4/Internal.o )
[2 of 2] Compiling Geo.Proj4        ( src/Geo/Proj4.hs, dist/build/Geo/Proj4.o )
Warning: the following files would be used as linker inputs, but linking is not being done: include/c_proj4.h
ghc: no input files
Usage: For basic information, try the `--help' option.
Failed to install proj4-hs-bindings-0.1
cabal: Error: some packages failed to install:
proj4-hs-bindings-0.1 failed during the building phase. The exception was:
ExitFailure 1