Resolving dependencies...
Configuring data-binary-ieee754-0.4.4...
Configuring mtl-2.2.1...
Building data-binary-ieee754-0.4.4...
Building mtl-2.2.1...
Installed data-binary-ieee754-0.4.4
Configuring network-2.6.3.1...
Configuring random-1.1...
Installed mtl-2.2.1
Building network-2.6.3.1...
Building random-1.1...
Configuring text-1.2.2.1...
Installed random-1.1
Building text-1.2.2.1...
Installed network-2.6.3.1
Installed text-1.2.2.1
Configuring polyparse-1.12...
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Building polyparse-1.12...
Installed parsec-3.1.11
Installed polyparse-1.12
Configuring HaXml-1.25.3...
Building HaXml-1.25.3...
Installed HaXml-1.25.3
Configuring dbus-core-0.8.1...
Building dbus-core-0.8.1...
Failed to install dbus-core-0.8.1
Build log ( /home/builder/.cabal/logs/dbus-core-0.8.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-7636/dbus-core-0.8.1'
Configuring dbus-core-0.8.1...
Building dbus-core-0.8.1...
Preprocessing library dbus-core-0.8.1...
[ 1 of 18] Compiling DBus.Wire.Unicode ( hs/DBus/Wire/Unicode.hs, dist/build/DBus/Wire/Unicode.o )
[ 2 of 18] Compiling DBus.Util        ( hs/DBus/Util.hs, dist/build/DBus/Util.o )
[ 3 of 18] Compiling DBus.UUID        ( hs/DBus/UUID.hs, dist/build/DBus/UUID.o )
[ 4 of 18] Compiling DBus.Types       ( hs/DBus/Types.hs, dist/build/DBus/Types.o )

hs/DBus/Types.hs:305:10: error:
    • Illegal instance declaration for ‘Variable String’
        (All instance types must be of the form (T a1 ... an)
         where a1 ... an are *distinct type variables*,
         and each type variable appears at most once in the instance head.
         Use FlexibleInstances if you want to disable this.)
    • In the instance declaration for ‘Variable String’
cabal: Leaving directory '/tmp/cabal-tmp-7636/dbus-core-0.8.1'
cabal: Error: some packages failed to install:
dbus-client-0.1 depends on dbus-core-0.8.1 which failed to install.
dbus-core-0.8.1 failed during the building phase. The exception was:
ExitFailure 1