Warning: The install command is a part of the legacy v1 style of cabal usage.

Please switch to using either the new project style and the new-install
command or the legacy v1-install alias as new-style projects will become the
default in the next version of cabal-install. Please file a bug if you cannot
replicate a working v1- use case with the new-style commands.

For more information, see: https://wiki.haskell.org/Cabal/NewBuild

Resolving dependencies...
Starting     ghc-paths-0.1.0.9
Starting     random-1.1
Starting     syb-0.7
Starting     network-3.1.0.0
Building     random-1.1
Building     syb-0.7
Building     ghc-paths-0.1.0.9
Building     network-3.1.0.0
Completed    random-1.1
Completed    syb-0.7
Completed    ghc-paths-0.1.0.9
Completed    network-3.1.0.0
Starting     intero-0.1.40
Building     intero-0.1.40
Failed to install intero-0.1.40
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/intero-0.1.40-2R7C5BZmB50GIUVogFWS2.log ):
cabal: Entering directory '/tmp/cabal-tmp-19956/intero-0.1.40'
Configuring intero-0.1.40...
Preprocessing executable 'intero' for intero-0.1.40..
Building executable 'intero' for intero-0.1.40..
[ 1 of 10] Compiling Intero.Compat    ( src/Intero/Compat.hs, dist/build/intero/intero-tmp/Intero/Compat.o )
[ 2 of 10] Compiling GhciTypes        ( src/GhciTypes.hs, dist/build/intero/intero-tmp/GhciTypes.o )
[ 3 of 10] Compiling GhciMonad        ( src/GhciMonad.hs, dist/build/intero/intero-tmp/GhciMonad.o )
[ 4 of 10] Compiling GhciTags         ( src/GhciTags.hs, dist/build/intero/intero-tmp/GhciTags.o )
[ 5 of 10] Compiling GhciInfo         ( src/GhciInfo.hs, dist/build/intero/intero-tmp/GhciInfo.o )
[ 6 of 10] Compiling GhciFind         ( src/GhciFind.hs, dist/build/intero/intero-tmp/GhciFind.o )
[ 7 of 10] Compiling Completion       ( src/Completion.hs, dist/build/intero/intero-tmp/Completion.o )
[ 8 of 10] Compiling Paths_intero     ( dist/build/intero/autogen/Paths_intero.hs, dist/build/intero/intero-tmp/Paths_intero.o )
[ 9 of 10] Compiling InteractiveUI    ( src/InteractiveUI.hs, dist/build/intero/intero-tmp/InteractiveUI.o )

src/InteractiveUI.hs:116:1: error:
    Could not find module ‘Network’
    Use -v to see a list of the files searched for.
    |
116 | import qualified Network
    | ^^^^^^^^^^^^^^^^^^^^^^^^

src/InteractiveUI.hs:117:1: error:
    Could not find module ‘Network.BSD’
    Use -v to see a list of the files searched for.
    |
117 | import Network.BSD
    | ^^^^^^^^^^^^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-19956/intero-0.1.40'
cabal: Error: some packages failed to install:
intero-0.1.40-2R7C5BZmB50GIUVogFWS2 failed during the building phase. The
exception was:
ExitFailure 1