Resolving dependencies...
Starting     parser-combinators-tests-1.3.0
Building     parser-combinators-tests-1.3.0
Failed to install parser-combinators-tests-1.3.0
Build log ( /home/builder/.cabal/logs/ghc-8.10.2/parser-combinators-tests-1.3.0-8l014DIG7qM9uj3H2VM0Cw.log ):
cabal: Entering directory '/tmp/cabal-tmp-12538/parser-combinators-tests-1.3.0'
Configuring parser-combinators-tests-1.3.0...
Building parser-combinators-tests-1.3.0...
Warning: No documentation was generated as this package does not contain a
library. Perhaps you want to use the --executables, --tests, --benchmarks or
--foreign-libraries flags.
cabal: No executables and no library found. Nothing to do.

cabal: Leaving directory '/tmp/cabal-tmp-12538/parser-combinators-tests-1.3.0'
cabal: Error: some packages failed to install:
parser-combinators-tests-1.3.0-8l014DIG7qM9uj3H2VM0Cw failed during the final
install step. The exception was:
ExitFailure 1