Resolving dependencies...
Configuring cereal-0.5.4.0...
Configuring old-locale-1.0.0.7...
Building old-locale-1.0.0.7...
Building cereal-0.5.4.0...
Installed old-locale-1.0.0.7
Configuring primitive-0.6.1.0...
Building primitive-0.6.1.0...
Installed cereal-0.5.4.0
Configuring text-1.2.2.1...
Building text-1.2.2.1...
Configuring old-time-1.1.0.3...
Installed primitive-0.6.1.0
Building old-time-1.1.0.3...
Installed old-time-1.1.0.3
Configuring vector-0.11.0.0...
Building vector-0.11.0.0...
Installed text-1.2.2.1
Configuring blaze-builder-0.4.0.2...
Building blaze-builder-0.4.0.2...
Configuring hashable-1.2.4.0...
Installed blaze-builder-0.4.0.2
Building hashable-1.2.4.0...
Configuring path-pieces-0.2.1...
Installed hashable-1.2.4.0
Building path-pieces-0.2.1...
Configuring blaze-markup-0.7.1.1...
Installed path-pieces-0.2.1
Building blaze-markup-0.7.1.1...
Installed blaze-markup-0.7.1.1
Installed vector-0.11.0.0
Configuring safecopy-0.9.2...
Building safecopy-0.9.2...
Installed safecopy-0.9.2
Downloading special-keys-0.1.0.0...
Configuring special-keys-0.1.0.0...
Building special-keys-0.1.0.0...
Failed to install special-keys-0.1.0.0
Build log ( /home/builder/.cabal/logs/special-keys-0.1.0.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-10633/special-keys-0.1.0.0'
Configuring special-keys-0.1.0.0...
Building special-keys-0.1.0.0...
Preprocessing library special-keys-0.1.0.0...
[1 of 3] Compiling Keys.Constraints ( Keys/Constraints.hs, dist/build/Keys/Constraints.o )
[2 of 3] Compiling Keys.Random      ( Keys/Random.hs, dist/build/Keys/Random.o )

Keys/Random.hs:3:1: error:
    Failed to load interface for ‘System.Random.MWC’
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-10633/special-keys-0.1.0.0'
cabal: Error: some packages failed to install:
special-keys-0.1.0.0 failed during the building phase. The exception was:
ExitFailure 1