Resolving dependencies...
Configuring mtl-2.2.1...
Configuring old-locale-1.0.0.7...
Building mtl-2.2.1...
Building old-locale-1.0.0.7...
Installed old-locale-1.0.0.7
Configuring parallel-3.2.1.0...
Building parallel-3.2.1.0...
Configuring text-1.2.2.1...
Installed mtl-2.2.1
Configuring old-time-1.1.0.3...
Installed parallel-3.2.1.0
Building text-1.2.2.1...
Building old-time-1.1.0.3...
Configuring regex-base-0.93.2...
Installed old-time-1.1.0.3
Building regex-base-0.93.2...
Installed regex-base-0.93.2
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Configuring regex-tdfa-1.2.2...
Building regex-tdfa-1.2.2...
Installed regex-tdfa-1.2.2
Configuring Unixutils-1.27...
Building Unixutils-1.27...
Failed to install Unixutils-1.27
Build log ( /home/builder/.cabal/logs/Unixutils-1.27.log ):
cabal: Entering directory '/tmp/cabal-tmp-2361/Unixutils-1.27'
Configuring Unixutils-1.27...
Building Unixutils-1.27...
Preprocessing library Unixutils-1.27...
[ 1 of 10] Compiling System.Unix.SpecialDevice ( System/Unix/SpecialDevice.hs, dist/build/System/Unix/SpecialDevice.o )

System/Unix/SpecialDevice.hs:7:20: warning: [-Wtabs]
    Tab character found here, and in 31 further locations.
    Please use spaces instead.
[ 2 of 10] Compiling System.Unix.Progress ( System/Unix/Progress.hs, dist/build/System/Unix/Progress.o )

System/Unix/Progress.hs:7:18: warning: [-Wtabs]
    Tab character found here, and in 24 further locations.
    Please use spaces instead.
[ 3 of 10] Compiling System.Unix.Process ( System/Unix/Process.hs, dist/build/System/Unix/Process.o )

System/Unix/Process.hs:43:37: error:
    Module ‘Control.Parallel.Strategies’ does not export ‘rnf’
cabal: Leaving directory '/tmp/cabal-tmp-2361/Unixutils-1.27'
cabal: Error: some packages failed to install:
Unixutils-1.27 failed during the building phase. The exception was:
ExitFailure 1