Resolving dependencies...
Configuring textPlot-0.2...
Building textPlot-0.2...
Failed to install textPlot-0.2
Build log ( /home/builder/.cabal/logs/textPlot-0.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-1540/textPlot-0.2'
Configuring textPlot-0.2...
Building textPlot-0.2...
Preprocessing library textPlot-0.2...
[1 of 1] Compiling TextPlot         ( TextPlot.hs, dist/build/TextPlot.o )

TextPlot.hs:46:10: error:
    • Illegal instance declaration for ‘Show Function’
        (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 ‘Show Function’

TextPlot.hs:82:10: error:
    • Illegal instance declaration for ‘EditPlot XYPlot Function’
        (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 ‘EditPlot XYPlot Function’
cabal: Leaving directory '/tmp/cabal-tmp-1540/textPlot-0.2'
cabal: Error: some packages failed to install:
textPlot-0.2 failed during the building phase. The exception was:
ExitFailure 1