Testsuite (doctest) needs `--write-ghc-environment-files=always`

[andreasabel]

Tests are failing on hackage: https://hackage.haskell.org/package/type-errors-0.2.0.2/reports/1
I can reproduce this locally because I have cabal configuration setting write-ghc-environment-files: never.

Test suite test: RUNNING...

src/Type/Errors.hs:8:8: error:
    Could not load module ‘Prelude’
    It is a member of the hidden package ‘base-4.16.4.0’.
...
<interactive>:2:71: error:
    Not in scope: type constructor or class ‘Data.String.String’
    No module named ‘Data.String’ is imported.
(seems to hang here)

Tests pass after cabal build --write-ghc-environment-files=always.
Not sure what can be done about it.
One can disable the hackage tests at: https://hackage.haskell.org/package/type-errors-0.2.0.2/reports/testsEnabled/
However, it would be better if one could pass the configuration needed to run the test.

[isovector]

Thanks for the report! Is this new functionality on hackage? I just pushed a new version but it was a tiny dependency bump and I wouldn't expect any breakage.

[isovector]

I've disabled the tests on hackage for now.

[andreasabel]

Is this new functionality on hackage?

Likely the last deployment of the hackage-server broke this.

[gbaz]

If you want to write a patch enabling it, I'm down to try... I think our builder is "sealed" enough this should be fine.