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     random-1.1
Building     random-1.1
Completed    random-1.1
Starting     splitmix-0.0.2
Building     splitmix-0.0.2
Completed    splitmix-0.0.2
Starting     QuickCheck-2.13.1
Building     QuickCheck-2.13.1
Completed    QuickCheck-2.13.1
Starting     has-0.6.0.1
Failed to install has-0.6.0.1
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/has-0.6.0.1-DblYcqoG1F3Bi2ZdHp5YcV.log ):
cabal: Entering directory '/tmp/cabal-tmp-12066/has-0.6.0.1'
cabal: Leaving directory '/tmp/cabal-tmp-12066/has-0.6.0.1'
cabal: Error: some packages failed to install:
has-0.6.0.1-DblYcqoG1F3Bi2ZdHp5YcV failed during the configure step. The
exception was:
dieVerbatim: user error (cabal: '/opt/ghc/bin/ghc' exited with an error:
Loaded package environment from
/home/builder/hackage-server/.ghc.environment.x86_64-linux-8.6.3

/tmp/cabal-tmp-12066/has-0.6.0.1/dist/setup/setup.hs:2:1: error:
Ambiguous module name ‘Distribution.Simple’:
it was found in multiple packages: Cabal-2.4.0.1 Cabal-2.4.1.0
|
2 | import Distribution.Simple
| ^^^^^^^^^^^^^^^^^^^^^^^^^^

/tmp/cabal-tmp-12066/has-0.6.0.1/dist/setup/setup.hs:3:1: error:
Ambiguous module name ‘Distribution.Simple.LocalBuildInfo’:
it was found in multiple packages: Cabal-2.4.0.1 Cabal-2.4.1.0
|
3 | import Distribution.Simple.LocalBuildInfo
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)