Resolving dependencies...
Starting     base-orphans-0.8.6
Starting     dlist-1.0
Starting     fgl-5.7.0.3
Starting     base-compat-0.12.1
Building     base-orphans-0.8.6
Building     dlist-1.0
Building     fgl-5.7.0.3
Building     base-compat-0.12.1
Completed    dlist-1.0
Starting     indexed-traversable-0.1.2
Building     indexed-traversable-0.1.2
Completed    base-orphans-0.8.6
Starting     integer-logarithms-1.0.3.1
Building     integer-logarithms-1.0.3.1
Completed    base-compat-0.12.1
Starting     network-3.1.2.5
Completed    integer-logarithms-1.0.3.1
Starting     primitive-0.7.3.0
Completed    indexed-traversable-0.1.2
Starting     readline-1.0.3.0
Building     primitive-0.7.3.0
Failed to install readline-1.0.3.0
Build log ( /home/builder/.cabal/logs/ghc-8.10.2/readline-1.0.3.0-2LzJWK2sghGDHbQj7NkPOs.log ):
cabal: Entering directory '/tmp/cabal-tmp-26908/readline-1.0.3.0'
Warning: readline.cabal:9:3: Tabs used as indentation at 9:3, 10:3, 12:3,
13:3, 15:3, 16:3
Configuring readline-1.0.3.0...
checking for gcc... /usr/bin/cc
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/cc accepts -g... yes
checking for /usr/bin/cc option to accept ISO C89... none needed
checking for GNUreadline.framework... checking for readline... no
checking for tputs in -lncurses... no
checking for tputs in -ltermcap... yes
checking for readline in -lreadline... no
checking for rl_readline_version... no
configure: error: readline not found, so this package cannot be built
See `config.log' for more details.
cabal: Leaving directory '/tmp/cabal-tmp-26908/readline-1.0.3.0'
Starting     splitmix-0.1.0.4
Building     network-3.1.2.5
Building     splitmix-0.1.0.4
Completed    fgl-5.7.0.3
Completed    splitmix-0.1.0.4
Completed    network-3.1.2.5
Completed    primitive-0.7.3.0
cabal: Error: some packages failed to install:
exploring-interpreters-1.0.0.0-HEgtHHLOGCXIa53gGJhpJP depends on
exploring-interpreters-1.0.0.0 which failed to install.
readline-1.0.3.0-2LzJWK2sghGDHbQj7NkPOs failed during the configure step. The
exception was:
ExitFailure 1