Output of installation:
========================
/home/prvak # cabal install git-annex
Resolving dependencies...
Configuring wai-app-static-2.0.1...
Building wai-app-static-2.0.1...
Failed to install wai-app-static-2.0.1
Last 10 lines of the build log ( /root/.cabal/logs/wai-app-static-2.0.1.log ):
Loading package unordered-containers-0.2.3.3 ... linking ... done.
Loading package semigroups-0.12.2 ... linking ... done.
Loading package void-0.6.1 ... linking ... done.
Loading package conduit-1.1.0 ... linking ... done.
Loading package blaze-builder-conduit-1.1.0 ... linking ... done.
Loading package case-insensitive-1.2.0.0 ... linking ... done.
Loading package scientific-0.2.0.2 ... linking ... done.
Loading package attoparsec-0.11.2.1 ... linking ... done.
Loading package parsec-3.1.5 ... linking ... ghc: /usr/local/lib/x86_64-linux-ghc-7.6.3/parsec-3.1.5/HSparsec-3.1.5.o: unknown symbol `textzm1zi1zi0zi1_DataziTextziUnsafe_Iter_con_info'
ghc: unable to load package `parsec-3.1.5'
cabal: Error: some packages failed to install:
DAV-0.6.2 depends on wai-app-static-2.0.1 which failed to install.
git-annex-5.20140405 depends on wai-app-static-2.0.1 which failed to install.
hamlet-1.2.0 depends on wai-app-static-2.0.1 which failed to install.
shakespeare-2.0.0.1 depends on wai-app-static-2.0.1 which failed to install.
shakespeare-css-1.1.0 depends on wai-app-static-2.0.1 which failed to install.
shakespeare-i18n-1.1.0 depends on wai-app-static-2.0.1 which failed to
install.
shakespeare-js-1.3.0 depends on wai-app-static-2.0.1 which failed to install.
wai-app-static-2.0.1 failed during the building phase. The exception was:
ExitFailure 1
xml-hamlet-0.4.0.8 depends on wai-app-static-2.0.1 which failed to install.
yesod-1.2.5.2 depends on wai-app-static-2.0.1 which failed to install.
yesod-auth-1.3.0.2 depends on wai-app-static-2.0.1 which failed to install.
yesod-core-1.2.11.1 depends on wai-app-static-2.0.1 which failed to install.
yesod-default-1.2.0 depends on wai-app-static-2.0.1 which failed to install.
yesod-form-1.3.8.1 depends on wai-app-static-2.0.1 which failed to install.
yesod-persistent-1.2.2.3 depends on wai-app-static-2.0.1 which failed to
install.
yesod-static-1.2.2.4 depends on wai-app-static-2.0.1 which failed to install.
/home/prvak #

/root/.cabal/logs/wai-app-static-2.0.1.log:
===========================================
Building wai-app-static-2.0.1...
Preprocessing library wai-app-static-2.0.1...
[1 of 9] Compiling WaiAppStatic.Types ( WaiAppStatic/Types.hs, dist/build/WaiAppStatic/Types.o )
[2 of 9] Compiling Util             ( Util.hs, dist/build/Util.o )
[3 of 9] Compiling WaiAppStatic.Listing ( WaiAppStatic/Listing.hs, dist/build/WaiAppStatic/Listing.o )
[4 of 9] Compiling WaiAppStatic.Storage.Filesystem ( WaiAppStatic/Storage/Filesystem.hs, dist/build/WaiAppStatic/Storage/Filesystem.o )
[5 of 9] Compiling WaiAppStatic.Storage.Embedded.Runtime ( WaiAppStatic/Storage/Embedded/Runtime.hs, dist/build/WaiAppStatic/Storage/Embedded/Runtime.o )
[6 of 9] Compiling WaiAppStatic.Storage.Embedded.TH ( WaiAppStatic/Storage/Embedded/TH.hs, dist/build/WaiAppStatic/Storage/Embedded/TH.o )
[7 of 9] Compiling WaiAppStatic.Storage.Embedded ( WaiAppStatic/Storage/Embedded.hs, dist/build/WaiAppStatic/Storage/Embedded.o )
[8 of 9] Compiling Network.Wai.Application.Static ( Network/Wai/Application/Static.hs, dist/build/Network/Wai/Application/Static.o )
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package array-0.4.0.1 ... linking ... done.
Loading package deepseq-1.3.0.1 ... linking ... done.
Loading package bytestring-0.10.0.2 ... linking ... done.
Loading package text-1.0.0.1 ... linking ... done.
Loading package blaze-builder-0.3.3.2 ... linking ... done.
Loading package containers-0.5.0.0 ... linking ... done.
Loading package filepath-1.3.0.1 ... linking ... done.
Loading package old-locale-1.0.0.5 ... linking ... done.
Loading package time-1.4.0.1 ... linking ... done.
Loading package unix-2.6.0.1 ... linking ... done.
Loading package directory-1.2.0.1 ... linking ... done.
Loading package transformers-0.3.0.0 ... linking ... done.
Loading package mtl-2.1.2 ... linking ... done.
Loading package exceptions-0.5 ... linking ... done.
Loading package base-unicode-symbols-0.2.2.4 ... linking ... done.
Loading package transformers-base-0.4.1 ... linking ... done.
Loading package monad-control-0.3.2.3 ... linking ... done.
Loading package lifted-base-0.2.2.1 ... linking ... done.
Loading package mmorph-1.0.2 ... linking ... done.
Loading package resourcet-1.1.1 ... linking ... done.
Loading package text-stream-decode-0.1.0.5 ... linking ... done.
Loading package hashable-1.2.1.0 ... linking ... done.
Loading package nats-0.1.2 ... linking ... done.
Loading package unordered-containers-0.2.3.3 ... linking ... done.
Loading package semigroups-0.12.2 ... linking ... done.
Loading package void-0.6.1 ... linking ... done.
Loading package conduit-1.1.0 ... linking ... done.
Loading package blaze-builder-conduit-1.1.0 ... linking ... done.
Loading package case-insensitive-1.2.0.0 ... linking ... done.
Loading package scientific-0.2.0.2 ... linking ... done.
Loading package attoparsec-0.11.2.1 ... linking ... done.
Loading package parsec-3.1.5 ... linking ... ghc: /usr/local/lib/x86_64-linux-ghc-7.6.3/parsec-3.1.5/HSparsec-3.1.5.o: unknown symbol `textzm1zi1zi0zi1_DataziTextziUnsafe_Iter_con_info'
ghc: unable to load package `parsec-3.1.5'