Stack resolver to correspond with CI image 8.6.5

1 job for master in 63 minutes and 28 seconds (queued for 1 second)
Status Name Job ID Coverage
failed build #1077


Name Stage Failure
build Test There is an unknown failure, please try again
--  While building package language-javascript- using:
/root/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_2.4.0.1_ghc-8.6.5 --builddir=.stack-work/dist/x86_64-linux/Cabal- build --ghc-options " -ddump-hi -ddump-to-file"
Process exited with code: ExitFailure 1
Logs have been written to: /builds/league/bookme/.stack-work/logs/language-javascript-

Configuring language-javascript-
Preprocessing library for language-javascript-
happy: src/Language/JavaScript/Parser/Grammar7.y: hGetContents: invalid argument (invalid byte sequence)
ERROR: Job failed: exit code 1