Resolving dependencies...
Configuring mtl-2.2.1...
Configuring syb-0.6...
Building mtl-2.2.1...
Building syb-0.6...
Configuring text-1.2.2.1...
Installed syb-0.6
Installed mtl-2.2.1
Building text-1.2.2.1...
Installed text-1.2.2.1
Configuring hashable-1.2.5.0...
Configuring parsec-3.1.11...
Building hashable-1.2.5.0...
Building parsec-3.1.11...
Installed hashable-1.2.5.0
Configuring unordered-containers-0.2.7.2...
Building unordered-containers-0.2.7.2...
Installed parsec-3.1.11
Configuring csv-0.1.2...
Building csv-0.1.2...
Installed csv-0.1.2
Installed unordered-containers-0.2.7.2
Configuring uniplate-1.6.12...
Building uniplate-1.6.12...
Installed uniplate-1.6.12
Configuring yhccore-0.9.1...
Building yhccore-0.9.1...
Failed to install yhccore-0.9.1
Build log ( /home/builder/.cabal/logs/yhccore-0.9.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-13100/yhccore-0.9.1'
Configuring yhccore-0.9.1...
Building yhccore-0.9.1...
Preprocessing library yhccore-0.9.1...
[ 1 of 32] Compiling Yhc.Core.UniqueId ( Yhc/Core/UniqueId.hs, dist/build/Yhc/Core/UniqueId.o )

Yhc/Core/UniqueId.hs:29:24: error:
    • Illegal instance declaration for ‘UniqueIdM (State a)’
        (All instance types must be of the form (T t1 ... tn)
         where T is not a synonym.
         Use TypeSynonymInstances if you want to disable this.)
    • In the instance declaration for ‘UniqueIdM (State a)’
cabal: Leaving directory '/tmp/cabal-tmp-13100/yhccore-0.9.1'
cabal: Error: some packages failed to install:
hugs2yc-0.1 depends on yhccore-0.9.1 which failed to install.
ycextra-0.1 depends on yhccore-0.9.1 which failed to install.
yhccore-0.9.1 failed during the building phase. The exception was:
ExitFailure 1