Resolving dependencies...
Configuring proj4-hs-bindings-0.1...
Building proj4-hs-bindings-0.1...
Failed to install proj4-hs-bindings-0.1
Build log ( /home/builder/.cabal/logs/proj4-hs-bindings-0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-17180/proj4-hs-bindings-0.1'
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 )

src/Geo/Proj4/Internal.hs:6:15: warning: [-Wtabs]
    Tab character found here, and in 67 further locations.
    Please use spaces instead.
[2 of 2] Compiling Geo.Proj4        ( src/Geo/Proj4.hs, dist/build/Geo/Proj4.o )

src/Geo/Proj4.hs:2:1: warning: [-Wtabs]
    Tab character found here, and in 15 further locations.
    Please use spaces instead.
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.
cabal: Leaving directory '/tmp/cabal-tmp-17180/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