Resolving dependencies...
Configuring old-locale-1.0.0.7...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building old-locale-1.0.0.7...
Installed old-locale-1.0.0.7
Configuring primitive-0.6.1.0...
Building primitive-0.6.1.0...
Configuring safe-0.3.10...
Installed mtl-2.2.1
Building safe-0.3.10...
Configuring syb-0.6...
Installed primitive-0.6.1.0
Configuring th-lift-0.7.6...
Installed safe-0.3.10
Building syb-0.6...
Building th-lift-0.7.6...
Configuring text-1.2.2.1...
Installed th-lift-0.7.6
Building text-1.2.2.1...
Configuring transformers-compat-0.5.1.4...
Installed syb-0.6
Building transformers-compat-0.5.1.4...
Configuring old-time-1.1.0.3...
Installed transformers-compat-0.5.1.4
Building old-time-1.1.0.3...
Installed old-time-1.1.0.3
Configuring th-expand-syns-0.4.1.0...
Building th-expand-syns-0.4.1.0...
Configuring tagged-0.8.5...
Installed th-expand-syns-0.4.1.0
Building tagged-0.8.5...
Configuring vector-0.11.0.0...
Installed tagged-0.8.5
Building vector-0.11.0.0...
Configuring th-reify-many-0.1.6...
Installed text-1.2.2.1
Building th-reify-many-0.1.6...
Installed th-reify-many-0.1.6
Configuring polyparse-1.12...
Building polyparse-1.12...
Installed polyparse-1.12
Configuring cpphs-1.20.2...
Building cpphs-1.20.2...
Installed cpphs-1.20.2
Configuring haskell-src-exts-1.17.1...
Building haskell-src-exts-1.17.1...
Installed vector-0.11.0.0
Configuring th-lift-instances-0.1.10...
Building th-lift-instances-0.1.10...
Installed th-lift-instances-0.1.10
Configuring th-orphans-0.13.3...
Building th-orphans-0.13.3...
Installed th-orphans-0.13.3
Installed haskell-src-exts-1.17.1
Configuring haskell-src-meta-0.7.0...
Building haskell-src-meta-0.7.0...
Installed haskell-src-meta-0.7.0
Downloading hobbits-1.2.3...
Configuring hobbits-1.2.3...
Building hobbits-1.2.3...
Failed to install hobbits-1.2.3
Build log ( /home/builder/.cabal/logs/hobbits-1.2.3.log ):
cabal: Entering directory '/tmp/cabal-tmp-3899/hobbits-1.2.3'
Configuring hobbits-1.2.3...
Building hobbits-1.2.3...
Preprocessing library hobbits-1.2.3...
[ 1 of 15] Compiling Data.Type.RList  ( Data/Type/RList.hs, dist/build/Data/Type/RList.o )

Data/Type/RList.hs:38:15: error:
    Malformed head of type or class declaration: r1 :++: r2 :> a
cabal: Leaving directory '/tmp/cabal-tmp-3899/hobbits-1.2.3'
cabal: Error: some packages failed to install:
hobbits-1.2.3 failed during the building phase. The exception was:
ExitFailure 1