v2 script cannot run doctest test suites

[peti]

doctest performs some kind of magic to evaluate source code found in comments. Therefore, doctest suites need to be run in an environment that has access to the compiler and libraries that were used to build the package. The v2 generator, however, executes the test suite outside of that environment, which means the test suite will fail: https://travis-ci.org/peti/hsemail/jobs/145211013.

[phadej]

• for GHC-8+ there are .ghc.environment files which helps (you have to find the files yourself).
• for older ghc you could use cabal-doctest

[phadej]

I'll close this ticket for now. The proper new-doctest solution is tracked in haskell/cabal#4500