Resolving dependencies...
Configuring mtl-2.2.1...
Configuring primitive-0.6.1.0...
Building mtl-2.2.1...
Building primitive-0.6.1.0...
Installed mtl-2.2.1
Configuring text-1.2.2.1...
Installed primitive-0.6.1.0
Configuring vector-0.11.0.0...
Building text-1.2.2.1...
Building vector-0.11.0.0...
Installed text-1.2.2.1
Installed vector-0.11.0.0
Configuring sequor-0.2.3...
Building sequor-0.2.3...
Failed to install sequor-0.2.3
Build log ( /home/builder/.cabal/logs/sequor-0.2.3.log ):
cabal: Entering directory '/tmp/cabal-tmp-12115/sequor-0.2.3'
Configuring sequor-0.2.3...
Building sequor-0.2.3...
Preprocessing executable 'sequor' for sequor-0.2.3...
[ 1 of 14] Compiling Perceptron.Vector ( src/Perceptron/Vector.hs, dist/build/sequor/sequor-tmp/Perceptron/Vector.o )
[ 2 of 14] Compiling Helper.Utils     ( lib/Helper/Utils.hs, dist/build/sequor/sequor-tmp/Helper/Utils.o )
[ 3 of 14] Compiling Helper.Text      ( lib/Helper/Text.hs, dist/build/sequor/sequor-tmp/Helper/Text.o )

lib/Helper/Text.hs:55:10: error:
    Duplicate instance declarations:
      instance Binary Txt -- Defined at lib/Helper/Text.hs:55:10
      instance Binary Text -- Defined in ‘Data.Text.Lazy’
cabal: Leaving directory '/tmp/cabal-tmp-12115/sequor-0.2.3'
cabal: Error: some packages failed to install:
sequor-0.2.3 failed during the building phase. The exception was:
ExitFailure 1