[darcs-users] darcs: user error (URL.request_url: there is no curl or libwww!)

[Trent W. Buck]

What failure does this indicate?

  $ dist/build/darcs/darcs pull
  darcs: user error (URL.request_url: there is no curl or libwww!)

  darcs failed:  Not a repository: http://darcs.net (thread blocked
  indefinitely)

I'm getting it even though 'cabal configure --verbose' includes

  $ cabal configure --verbose -f'curses terminfo -haskeline external-zlib -libwww'
  [...]
  Flags chosen: base3=True, color=True, type-witnesses=False,
  curses=True, terminfo=True, haskeline=False, external-zlib=True,
  external-bytestring=True, http=True, libwww=False,
  curl-pipelining=False, curl=True
  [...]

I cabal cleaned before the cabal configure, and cabal build succeeded.
Curl is installed:

  $ pkg-config --modversion libcurl
  7.18.2

  $ aptitude -F %p%v search ~i~ncurl
  curl                 7.18.2-5
  libcurl3             7.18.2-5
  libcurl3-gnutls      7.18.2-5
  libcurl4-openssl-dev 7.18.2-5