Resolving dependencies...
Configuring SDL-0.6.7.0...
Building SDL-0.6.7.0...
Installed SDL-0.6.7.0
Downloading SDL-ttf-0.6.3.0...
Configuring SDL-ttf-0.6.3.0...
Failed to install SDL-ttf-0.6.3.0
Build log ( /home/builder/.cabal/logs/ghc-8.4.3/SDL-ttf-0.6.3.0-2vTpaV9FE8wI4W5vq06lrD.log ):
cabal: Entering directory '/tmp/cabal-tmp-28604/SDL-ttf-0.6.3.0'
[1 of 1] Compiling Main             ( /tmp/cabal-tmp-28604/SDL-ttf-0.6.3.0/dist/setup/setup.hs, /tmp/cabal-tmp-28604/SDL-ttf-0.6.3.0/dist/setup/Main.o )
Linking /tmp/cabal-tmp-28604/SDL-ttf-0.6.3.0/dist/setup/setup ...
Configuring SDL-ttf-0.6.3.0...
checking for sdl-config... /usr/bin/sdl-config
checking for gcc... /usr/bin/gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/gcc accepts -g... yes
checking for /usr/bin/gcc option to accept ISO C89... none needed
checking for TTF_OpenFont in -lSDL_ttf... no
configure: error: *** SDL_ttf lib not found! Get SDL_ttf from
http://www.libsdl.org/projects/SDL_ttf/index.html
cabal: Leaving directory '/tmp/cabal-tmp-28604/SDL-ttf-0.6.3.0'
cabal: Error: some packages failed to install:
SDL-ttf-0.6.3.0-2vTpaV9FE8wI4W5vq06lrD failed during the configure step. The
exception was:
ExitFailure 1