Resolving dependencies...
Downloading simple-sendfile-0.2.9...
Configuring simple-sendfile-0.2.9...
Building simple-sendfile-0.2.9...
Preprocessing library simple-sendfile-0.2.9...
[1 of 3] Compiling Network.Sendfile.Types ( Network/Sendfile/Types.hs, dist/build/Network/Sendfile/Types.o )
[2 of 3] Compiling Network.Sendfile.Linux ( dist/build/Network/Sendfile/Linux.hs, dist/build/Network/Sendfile/Linux.o )

Network/Sendfile/Linux.hsc:107:15: Not in scope: `errno'
Failed to install simple-sendfile-0.2.9
cabal: Error: some packages failed to install:
simple-sendfile-0.2.9 failed during the building phase. The exception was:
ExitFailure 1