Resolving dependencies...
Configuring primitive-0.6.2.0...
Configuring random-1.1...
Building random-1.1...
Building primitive-0.6.2.0...
Configuring safe-0.3.10...
Installed random-1.1
Building safe-0.3.10...
Installed safe-0.3.10
Installed primitive-0.6.2.0
Configuring tf-random-0.5...
Building tf-random-0.5...
Installed tf-random-0.5
Configuring QuickCheck-2.9.2...
Building QuickCheck-2.9.2...
Installed QuickCheck-2.9.2
Configuring dequeue-0.1.9...
Building dequeue-0.1.9...
Failed to install dequeue-0.1.9
Build log ( /home/builder/.cabal/logs/dequeue-0.1.9.log ):
cabal: Entering directory '/tmp/cabal-tmp-13817/dequeue-0.1.9'
Configuring dequeue-0.1.9...
Building dequeue-0.1.9...
Preprocessing library dequeue-0.1.9...
[1 of 2] Compiling Data.Dequeue.Show ( src/Data/Dequeue/Show.hs, dist/build/Data/Dequeue/Show.o )
[2 of 2] Compiling Data.Dequeue     ( src/Data/Dequeue.hs, dist/build/Data/Dequeue.o )

src/Data/Dequeue.hs:344:63: error:
    Not in scope: type constructor or class ‘Prop’

src/Data/Dequeue.hs:352:62: error:
    Not in scope: type constructor or class ‘Prop’
cabal: Leaving directory '/tmp/cabal-tmp-13817/dequeue-0.1.9'
cabal: Error: some packages failed to install:
dequeue-0.1.9 failed during the building phase. The exception was:
ExitFailure 1