### Please describe the problem.

Can't install git-annex from current git master. cabal install also fails. Both fail with the same error.

### What steps will reproduce the problem?

cabal install git-annex --bindir=$HOME/bin

### What version of git-annex are you using? On what operating system?

[[!format sh """
$ uname -a
Linux arch 3.16.3-1-ARCH #1 SMP PREEMPT Wed Sep 17 21:54:13 CEST 2014 x86_64 GNU/Linux

$ cabal --version
cabal-install version 1.20.0.3
using version 1.20.0.0 of the Cabal library
"""]]

### Please provide any additional information below.

[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log

$ cabal install git-annex --bindir=$HOME/bin
Resolving dependencies...
Configuring DAV-1.0.2...
Configuring gnuidn-0.2.1...
Configuring gsasl-0.3.5...
Configuring hS3-0.5.8...
Failed to install gsasl-0.3.5
Build log ( /home/dirk/.cabal/logs/gsasl-0.3.5.log ):
Configuring gsasl-0.3.5...
setup-Simple-Cabal-1.18.1.3-x86_64-linux-ghc-7.8.3: The pkg-config package
libgsasl version >=1.1 is required but it could not be found.
Failed to install gnuidn-0.2.1
Build log ( /home/dirk/.cabal/logs/gnuidn-0.2.1.log ):
Configuring gnuidn-0.2.1...
setup-Simple-Cabal-1.18.1.3-x86_64-linux-ghc-7.8.3: The program c2hs is
required but it could not be found.
Building hS3-0.5.8...
Building DAV-1.0.2...
Failed to install hS3-0.5.8
Build log ( /home/dirk/.cabal/logs/hS3-0.5.8.log ):
Configuring hS3-0.5.8...
Building hS3-0.5.8...
Preprocessing library hS3-0.5.8...

Network/AWS/S3Object.hs:26:8:
    Could not find module ‘Network.URI’
    It is a member of the hidden package ‘network-uri-2.6.0.1’.
    Perhaps you need to add ‘network-uri’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
Failed to install DAV-1.0.2
Build log ( /home/dirk/.cabal/logs/DAV-1.0.2.log ):
Configuring DAV-1.0.2...
Building DAV-1.0.2...
Preprocessing library DAV-1.0.2...
[1 of 2] Compiling Network.Protocol.HTTP.DAV.TH ( Network/Protocol/HTTP/DAV/TH.hs, dist/build/Network/Protocol/HTTP/DAV/TH.o )
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package array-0.5.0.0 ... linking ... done.
Loading package deepseq-1.3.0.2 ... linking ... done.
Loading package containers-0.5.5.1 ... linking ... done.
Loading package bytestring-0.10.4.0 ... linking ... done.
Loading package transformers-0.3.0.0 ... linking ... done.
Loading package mtl-2.1.3.1 ... linking ... done.
Loading package text-1.2.0.0 ... linking ... done.
Loading package parsec-3.1.6 ... linking ... done.
Loading package hashable-1.2.2.0 ... linking ... done.
Loading package scientific-0.3.3.1 ... linking ... done.
Loading package attoparsec-0.12.1.2 ... linking ... done.
Loading package dlist-0.7.1 ... linking ... done.
Loading package old-locale-1.0.0.6 ... linking ... done.
Loading package syb-0.4.2 ... linking ... done.
Loading package pretty-1.1.1.1 ... linking ... done.
Loading package template-haskell ... linking ... done.
Loading package time-1.4.2 ... linking ... done.
Loading package unordered-containers-0.2.5.0 ... linking ... done.
Loading package primitive-0.5.3.0 ... linking ... done.
Loading package vector-0.10.11.0 ... linking ... done.
Loading package aeson-0.8.0.0 ... linking ... done.
Loading package blaze-builder-0.3.3.4 ... linking ... done.
Loading package blaze-markup-0.6.1.1 ... linking ... done.
Loading package blaze-html-0.7.0.3 ... linking ... done.
Loading package filepath-1.3.0.2 ... linking ... done.
Loading package unix-2.7.0.1 ... linking ... done.
Loading package directory-1.2.1.0 ... linking ... done.
Loading package exceptions-0.6.1 ... linking ... done.
Loading package process-1.2.0.0 ... linking ... done.
Loading package system-filepath-0.4.12 ... linking ... done.
Loading package system-fileio-0.3.14 ... linking ... done.
Loading package shakespeare-2.0.1.1 ... linking ... done.
Loading package stm-2.4.3 ... linking ... done.
Loading package transformers-base-0.4.3 ... linking ... done.
Loading package monad-control-0.3.3.0 ... linking ... done.
Loading package lifted-base-0.2.3.0 ... linking ... done.
Loading package mmorph-1.0.4 ... linking ... done.
Loading package resourcet-1.1.2.3 ... linking ... done.
Loading package nats-0.2 ... linking ... done.
Loading package semigroups-0.15.3 ... linking ... done.
Loading package void-0.6.1 ... linking ... done.
Loading package conduit-1.2.0.2 ... linking ... done.
Loading package attoparsec-conduit-1.1.0 ... linking ... done.
Loading package blaze-builder-conduit-1.1.0 ... linking ... done.
Loading package network-2.6.0.2 ... linking ... done.
Loading package random-1.1 ... linking ... done.
Loading package zlib-0.5.4.1 ... linking ... done.
Loading package streaming-commons-0.1.5 ... linking ... done.
Loading package conduit-extra-1.1.3.4 ... linking ... done.
Loading package data-default-class-0.0.1 ... linking ... done.
Loading package data-default-instances-base-0.0.1 ... linking ... done.
Loading package data-default-instances-containers-0.0.1 ... linking ... done.
Loading package data-default-instances-dlist-0.0.1 ... linking ... done.
Loading package data-default-instances-old-locale-0.0.1 ... linking ... done.
Loading package data-default-0.5.3 ... linking ... done.
Loading package xml-types-0.3.4 ... linking ... done.
Loading package xml-conduit-1.2.2 ... linking ... done.
Loading package xml-hamlet-0.4.0.9 ... linking ... done.
Loading package transformers-compat-0.3.3.4 ... linking ... done.
Loading package contravariant-1.2 ... linking ... done.
Loading package tagged-0.7.2 ... linking ... done.
Loading package distributive-0.4.4 ... linking ... done.
Loading package comonad-4.2.2 ... linking ... done.
Loading package semigroupoids-4.2 ... linking ... done.
Loading package bifunctors-4.1.1.1 ... linking ... done.
Loading package prelude-extras-0.4 ... linking ... done.
Loading package profunctors-4.2.0.1 ... linking ... done.
Loading package free-4.9 ... linking ... done.
Loading package parallel-3.2.0.4 ... linking ... done.
Loading package reflection-1.5.1 ... linking ... done.
Loading package split-0.2.2 ... linking ... done.
Loading package lens-4.4.0.2 ... linking ... done.
Loading package byteable-0.1.1 ... linking ... done.
Loading package securemem-0.1.3 ... linking ... done.
Loading package crypto-cipher-types-0.0.9 ... linking ... done.
Loading package cipher-aes-0.2.8 ... linking ... done.
Loading package crypto-random-0.0.8 ... linking ... done.
Loading package cprng-aes-0.5.2 ... linking ... done.
Loading package cereal-0.4.0.1 ... linking ... done.
Loading package socks-0.5.4 ... linking ... done.
Loading package asn1-types-0.2.3 ... linking ... done.
Loading package asn1-encoding-0.8.1.3 ... linking ... done.
Loading package cipher-des-0.0.6 ... linking ... done.
Loading package cipher-rc4-0.1.4 ... linking ... done.
Loading package crypto-numbers-0.2.3 ... linking ... done.
Loading package crypto-pubkey-types-0.4.2.2 ... linking ... done.
Loading package cryptohash-0.11.6 ... linking ... done.
Loading package crypto-pubkey-0.2.4 ... linking ... done.
Loading package asn1-parse-0.8.1 ... linking ... done.
Loading package base64-bytestring-1.0.0.1 ... linking ... done.
Loading package pem-0.2.2 ... linking ... done.
Loading package x509-1.4.12 ... linking ... done.
Loading package x509-store-1.4.4 ... linking ... done.
Loading package x509-validation-1.5.0 ... linking ... done.
Loading package tls-1.2.9 ... linking ... done.
Loading package x509-system-1.4.5 ... linking ... done.
Loading package connection-0.2.3 ... linking ... done.
Loading package case-insensitive-1.2.0.1 ... linking ... done.
Loading package cookie-0.4.1.3 ... linking ... done.
Loading package http-types-0.8.5 ... linking ... done.
Loading package mime-types-0.1.0.4 ... linking ... done.
Loading package network-uri-2.6.0.1 ... linking ... done.
Loading package utf8-string-0.3.8 ... linking ... done.
Loading package publicsuffixlist-0.1 ... linking ... done.
Loading package http-client-0.4.0 ... linking ... done.
Loading package http-client-tls-0.2.2 ... linking ... done.
Loading package MonadRandom-0.3 ... linking ... done.
Loading package either-4.3.1 ... linking ... done.
Loading package safe-0.3.8 ... linking ... done.
Loading package errors-1.4.7 ... linking ... done.
[2 of 2] Compiling Network.Protocol.HTTP.DAV ( Network/Protocol/HTTP/DAV.hs, dist/build/Network/Protocol/HTTP/DAV.o )

Network/Protocol/HTTP/DAV.hs:80:1: Warning:
    The import of ‘unauthorized401’
    from module ‘Network.HTTP.Types’ is redundant

Network/Protocol/HTTP/DAV.hs:92:95: Warning:
    ‘DAVT’ is an instance of MonadPlus but not Alternative - this will become an error in GHC 7.10, under the Applicative-Monad Proposal.

Network/Protocol/HTTP/DAV.hs:213:1: Warning:
    Defined but not used: ‘supportsCalDAV’

Network/Protocol/HTTP/DAV.hs:88:10: Warning:
    Orphan instance: instance Default DAVContext

Network/Protocol/HTTP/DAV.hs:95:10: Warning:
    Orphan instance: instance MonadMask m => MonadMask (EitherT e m)
In-place registering DAV-1.0.2...
Preprocessing executable 'hdav' for DAV-1.0.2...

hdav.hs:33:8:
    Could not find module ‘Network.URI’
    It is a member of the hidden package ‘network-uri-2.6.0.1’.
    Perhaps you need to add ‘network-uri’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
cabal: Error: some packages failed to install:
DAV-1.0.2 failed during the building phase. The exception was:
ExitFailure 1
git-annex-5.20140919 depends on DAV-1.0.2 which failed to install.
gnuidn-0.2.1 failed during the configure step. The exception was:
ExitFailure 1
gsasl-0.3.5 failed during the configure step. The exception was:
ExitFailure 1
hS3-0.5.8 failed during the building phase. The exception was:
ExitFailure 1
network-protocol-xmpp-0.4.6 depends on gnuidn-0.2.1 which failed to install.

# End of transcript or log.
"""]]

> This is a bug in hS3, not in git-annex. hS3 needs to be updated
> per the example at <http://hackage.haskell.org/package/network>.
> Email sent to hS3 author; [[done]]. --[[Joey]]
