*** setup configure

Configuring clientsession-0.0.1...
Dependency Crypto -any: using Crypto-4.2.4
Dependency base ==4.*: using base-4.4.1.0
Dependency bytestring -any: using bytestring-0.9.2.0
Dependency dataenc -any: using dataenc-0.14.0.3
Dependency random -any: using random-1.0.1.1
Dependency utf8-string -any: using utf8-string-0.3.7
Using Cabal-1.12.0 compiled by ghc-7.2
Using compiler: ghc-7.2.2
Using install prefix: /usr/local/tmp/archive/install
Binaries installed in: /usr/local/tmp/archive/install/bin
Libraries installed in:
/usr/local/tmp/archive/install/lib/clientsession-0.0.1/ghc-7.2.2
Private binaries installed in: /usr/local/tmp/archive/install/libexec
Data files installed in:
/usr/local/tmp/archive/install/share/clientsession-0.0.1
Documentation installed in:
/usr/local/tmp/archive/install/share/doc/clientsession-0.0.1
Using alex version 3.0.1 found on system at: /usr/bin/alex
Using ar found on system at: /usr/bin/ar
Using c2hs version 0.16.3 found on system at: /usr/bin/c2hs
Using cpphs version 1.11 found on system at: /usr/bin/cpphs
Using ffihugs found on system at: /usr/local/bin/ffihugs
Using gcc version 4.6 found on system at: /usr/bin/gcc
Using ghc version 7.2.2 found on system at: /usr/local/bin/ghc
Using ghc-pkg version 7.2.2 found on system at: /usr/local/bin/ghc-pkg
No greencard found
Using haddock version 2.9.4 found on system at: /usr/local/bin/haddock
Using happy version 1.18.6 found on system at: /usr/bin/happy
No hmake found
Using hsc2hs version 0.67 found on system at: /usr/local/bin/hsc2hs
Using hscolour version 1.19 found on system at: /usr/bin/HsColour
Using hugs found on system at: /usr/local/bin/hugs
No jhc found
Using ld found on system at: /usr/bin/ld
No lhc found
No lhc-pkg found
No nhc98 found
Using pkg-config version 0.26 found on system at: /usr/bin/pkg-config
Using ranlib found on system at: /usr/bin/ranlib
Using strip found on system at: /usr/bin/strip
Using tar found on system at: /bin/tar
No uhc found

*** setup build

creating dist/build
creating dist/build/autogen
Building clientsession-0.0.1...
Preprocessing library clientsession-0.0.1...
Building library...
creating dist/build
/usr/local/bin/ghc --make -package-name clientsession-0.0.1 -hide-all-packages -fbuilding-cabal-package -i -idist/build -i. -idist/build/autogen -Idist/build/autogen -Idist/build -optP-include -optPdist/build/autogen/cabal_macros.h -odir dist/build -hidir dist/build -stubdir dist/build -package-id Crypto-4.2.4-21e9b0574168d1e6d7f0ebd18e813b24 -package-id base-4.4.1.0-1f81e4e7baf87af8ebbcf52b7bec2254 -package-id bytestring-0.9.2.0-6cd6a90f79cbe419ccff0712438db3e6 -package-id dataenc-0.14.0.3-58cc6fd4e3b3f7595f0d0f7a180d3e8a -package-id random-1.0.1.1-3b2e59e054dfe723af2450fc8151a390 -package-id utf8-string-0.3.7-59b2f76bee525ef52325b9245e4fcf74 -O -Wall -XHaskell98 Web.ClientSession
[1 of 1] Compiling Web.ClientSession ( Web/ClientSession.hs, dist/build/Web/ClientSession.o )

Web/ClientSession.hs:52:10:
    Illegal instance declaration for `IsByteString String'
      (All instance types must be of the form (T a1 ... an)
       where a1 ... an are *distinct type variables*,
       and each type variable appears at most once in the instance head.
       Use -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `IsByteString String'

Web/ClientSession.hs:84:10:
    Duplicate instance declarations:
      instance Random Word8 -- Defined at Web/ClientSession.hs:84:10-21
      instance Random Word8 -- Defined in System.Random