Haskell and nox11

[Tankko]

I need to install darcs on my server, and it requires Haskell (ghc)
which in turn seems to require the x11 system which is not installed
on my headless sever.

I have WITHOUT_X11=true set in /etc/make.conf

===>  Extracting for darcs-1.0.9
=> MD5 Checksum OK for darcs-1.0.9.tar.gz.
===>   darcs-1.0.9 depends on file: /usr/local/sbin/pkg_info - found
===>  Patching for darcs-1.0.9
===>   darcs-1.0.9 depends on executable: ghc - not found
===>    Verifying install for ghc in /usr/ports/lang/ghc
===>  ghc-nox11-6.6.1 unsupported at the moment.
*** Error code 1

Is this correct or I am doing something wrong?  It seems strange that
a programming language would require x11.

Is there a better was to get darcs and/or Haskell on my server without
installing x11?   Do most people that run backend server just install
x11 anyway?

Thanks, Tankko.