Resolving dependencies...
Downloading 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:
    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 -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `Show Function'

TextPlot.hs:82:10:
    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 -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `EditPlot XYPlot Function'
Failed to install textPlot-0.2
cabal: Error: some packages failed to install:
textPlot-0.2 failed during the building phase. The exception was:
ExitFailure 1