Resolving dependencies...
Configuring mtl-2.2.1...
Configuring random-1.1...
Building mtl-2.2.1...
Building random-1.1...
Installed random-1.1
Configuring text-1.2.2.1...
Building text-1.2.2.1...
Installed mtl-2.2.1
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 Eq-1.1...
Building Eq-1.1...
Failed to install Eq-1.1
Build log ( /home/builder/.cabal/logs/Eq-1.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-3721/Eq-1.1'
Configuring Eq-1.1...
Building Eq-1.1...
Preprocessing executable 'eq' for Eq-1.1...
[ 1 of 48] Compiling EqManips.UnicodeSymbols ( EqManips/UnicodeSymbols.hs, dist/build/eq/eq-tmp/EqManips/UnicodeSymbols.o )
[ 2 of 48] Compiling EqManips.Types[boot] ( EqManips/Types.hs-boot, dist/build/eq/eq-tmp/EqManips/Types.o-boot )
[ 3 of 48] Compiling EqManips.Renderer.Sexpr[boot] ( EqManips/Renderer/Sexpr.hs-boot, dist/build/eq/eq-tmp/EqManips/Renderer/Sexpr.o-boot )
[ 4 of 48] Compiling EqManips.Renderer.RenderConf ( EqManips/Renderer/RenderConf.hs, dist/build/eq/eq-tmp/EqManips/Renderer/RenderConf.o )
[ 5 of 48] Compiling EqManips.Propreties ( EqManips/Propreties.hs, dist/build/eq/eq-tmp/EqManips/Propreties.o )
[ 6 of 48] Compiling EqManips.Polynome[boot] ( EqManips/Polynome.hs-boot, dist/build/eq/eq-tmp/EqManips/Polynome.o-boot )
[ 7 of 48] Compiling EqManips.ErrorMessages ( EqManips/ErrorMessages.hs, dist/build/eq/eq-tmp/EqManips/ErrorMessages.o )
[ 8 of 48] Compiling EqManips.Types   ( EqManips/Types.hs, dist/build/eq/eq-tmp/EqManips/Types.o )

EqManips/Types.hs:602:10: error:
    • Illegal instance declaration for
        ‘Property UnOperator OperatorText 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
        ‘Property UnOperator OperatorText String’
cabal: Leaving directory '/tmp/cabal-tmp-3721/Eq-1.1'
cabal: Error: some packages failed to install:
Eq-1.1 failed during the building phase. The exception was:
ExitFailure 1