Resolving dependencies...
Configuring mtl-2.2.1...
Configuring pointedlist-0.6.1...
Building pointedlist-0.6.1...
Building mtl-2.2.1...
Installed pointedlist-0.6.1
Configuring text-1.2.2.1...
Building text-1.2.2.1...
Configuring vty-3.0.2...
Installed mtl-2.2.1
Building vty-3.0.2...
Configuring utf8-string-1.0.1.1...
Failed to install vty-3.0.2
Build log ( /home/builder/.cabal/logs/vty-3.0.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-21542/vty-3.0.2'
Configuring vty-3.0.2...
Building vty-3.0.2...
Preprocessing library vty-3.0.2...

Graphics/Vty.hs:1:16: warning:
    -fffi is deprecated: use -XForeignFunctionInterface or pragma {-# LANGUAGE ForeignFunctionInterface #-} instead

Graphics/Vty/Cursor.hs:1:16: warning:
    -fffi is deprecated: use -XForeignFunctionInterface or pragma {-# LANGUAGE ForeignFunctionInterface #-} instead
[1 of 4] Compiling Graphics.Vty.Types ( Graphics/Vty/Types.hs, dist/build/Graphics/Vty/Types.o )
[2 of 4] Compiling Graphics.Vty.LLInput ( Graphics/Vty/LLInput.hs, dist/build/Graphics/Vty/LLInput.o )

Graphics/Vty/LLInput.hs:71:9: error:
    • Variable not in scope: catch :: IO Char -> (t0 -> IO Char) -> t
    • Perhaps you meant data constructor ‘Catch’ (imported from System.Posix.Signals)
cabal: Leaving directory '/tmp/cabal-tmp-21542/vty-3.0.2'
Building utf8-string-1.0.1.1...
Installed utf8-string-1.0.1.1
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
cabal: Error: some packages failed to install:
tkhs-0.1.0.3 depends on vty-3.0.2 which failed to install.
vty-3.0.2 failed during the building phase. The exception was:
ExitFailure 1