Resolving dependencies...
Configuring mtl-2.2.1...
Configuring primitive-0.6.1.0...
Building mtl-2.2.1...
Building primitive-0.6.1.0...
Installed mtl-2.2.1
Configuring random-1.1...
Configuring text-1.2.2.1...
Installed primitive-0.6.1.0
Building random-1.1...
Building text-1.2.2.1...
Configuring utf8-string-1.0.1.1...
Installed random-1.1
Building utf8-string-1.0.1.1...
Installed utf8-string-1.0.1.1
Configuring vector-0.11.0.0...
Building vector-0.11.0.0...
Installed text-1.2.2.1
Configuring hashable-1.2.4.0...
Building hashable-1.2.4.0...
Configuring parsec-3.1.11...
Installed hashable-1.2.4.0
Building parsec-3.1.11...
Installed parsec-3.1.11
Installed vector-0.11.0.0
Configuring hashtables-1.2.1.0...
Building hashtables-1.2.1.0...
Installed hashtables-1.2.1.0
Configuring gtk2hs-buildtools-0.13.2.1...
Building gtk2hs-buildtools-0.13.2.1...
Installed gtk2hs-buildtools-0.13.2.1
Configuring cairo-0.13.3.1...
Configuring glib-0.13.4.1...
Building cairo-0.13.3.1...
Building glib-0.13.4.1...
Installed cairo-0.13.3.1
Installed glib-0.13.4.1
Configuring pango-0.13.3.1...
Configuring gio-0.13.3.1...
Building gio-0.13.3.1...
Building pango-0.13.3.1...
Installed pango-0.13.3.1
Installed gio-0.13.3.1
Configuring gtk-0.14.6...
Building gtk-0.14.6...
Installed gtk-0.14.6
Configuring ltk-0.8...
Building ltk-0.8...
Failed to install ltk-0.8
Build log ( /home/builder/.cabal/logs/ltk-0.8.log ):
cabal: Entering directory '/tmp/cabal-tmp-23827/ltk-0.8'
Configuring ltk-0.8...
Building ltk-0.8...
Preprocessing library ltk-0.8...
[ 1 of 12] Compiling MyMissing        ( src/MyMissing.hs, dist/build/MyMissing.o )

src/MyMissing.hs:48:1: warning: [-Wtabs]
    Tab character found here, and in five further locations.
    Please use spaces instead.
[ 2 of 12] Compiling Graphics.UI.Frame.Panes ( src/Graphics/UI/Frame/Panes.hs, dist/build/Graphics/UI/Frame/Panes.o )

src/Graphics/UI/Frame/Panes.hs:68:3: warning: [-Wtabs]
    Tab character found here.
    Please use spaces instead.
[ 3 of 12] Compiling Graphics.UI.Editor.Parameters ( src/Graphics/UI/Editor/Parameters.hs, dist/build/Graphics/UI/Editor/Parameters.o )
[ 4 of 12] Compiling Default          ( src/Default.hs, dist/build/Default.o )
[ 5 of 12] Compiling Control.Event    ( src/Control/Event.hs, dist/build/Control/Event.o )
[ 6 of 12] Compiling Graphics.UI.Editor.Basics ( src/Graphics/UI/Editor/Basics.hs, dist/build/Graphics/UI/Editor/Basics.o )
[ 7 of 12] Compiling Text.PrinterParser ( src/Text/PrinterParser.hs, dist/build/Text/PrinterParser.o )

src/Text/PrinterParser.hs:215:10: error:
    • Illegal instance declaration for ‘Pretty 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 ‘Pretty String’
cabal: Leaving directory '/tmp/cabal-tmp-23827/ltk-0.8'
cabal: Error: some packages failed to install:
ltk-0.8 failed during the building phase. The exception was:
ExitFailure 1