Hackage returns this error when it attempts to run tests:
Resolving dependencies...
Error:
Internal libraries only supported with per-component builds.
Per-component builds were disabled because program coverage is enabled
In the package 'attoparsec-0.14.4'
Hackage returns this error when it attempts to run tests:
Found this related discussion: https://github.com/haskell/cabal/issues/6440