The build is unreachable.

Build log

> /tmp/stackage-build2451$ stack unpack language-javascript-0.6.0.11@sha256:48576021b3917fa9cb88404e6f3b216a660f14786a808de289195f75817c0a3e
Unpacked language-javascript-0.6.0.11 to /tmp/stackage-build2451/language-javascript-0.6.0.11/
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
[1 of 1] Compiling Main             ( Setup.hs, Setup.o )
Linking Setup ...
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ./Setup configure --package-db=clear --package-db=global --package-db=/home/circleci/project/builds/nightly/pkgdb --libdir=/home/circleci/project/builds/nightly/lib --bindir=/home/circleci/project/builds/nightly/bin --datadir=/home/circleci/project/builds/nightly/share --libexecdir=/home/circleci/project/builds/nightly/libexec --sysconfdir=/home/circleci/project/builds/nightly/etc --docdir=/home/circleci/project/builds/nightly/doc/language-javascript-0.6.0.11 --htmldir=/home/circleci/project/builds/nightly/doc/language-javascript-0.6.0.11 --haddockdir=/home/circleci/project/builds/nightly/doc/language-javascript-0.6.0.11
Configuring language-javascript-0.6.0.11...
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ./Setup build
Preprocessing library for language-javascript-0.6.0.11..
unused rules: 3
shift/reduce conflicts:  138
reduce/reduce conflicts: 218
Building library for language-javascript-0.6.0.11..
[ 1 of 12] Compiling Language.JavaScript.Parser.SrcLocation ( src/Language/JavaScript/Parser/SrcLocation.hs, dist/build/Language/JavaScript/Parser/SrcLocation.o )
[ 2 of 12] Compiling Language.JavaScript.Parser.Token ( src/Language/JavaScript/Parser/Token.hs, dist/build/Language/JavaScript/Parser/Token.o )
[ 3 of 12] Compiling Language.JavaScript.Parser.ParserMonad ( src/Language/JavaScript/Parser/ParserMonad.hs, dist/build/Language/JavaScript/Parser/ParserMonad.o )
[ 4 of 12] Compiling Language.JavaScript.Parser.LexerUtils ( src/Language/JavaScript/Parser/LexerUtils.hs, dist/build/Language/JavaScript/Parser/LexerUtils.o )
[ 5 of 12] Compiling Language.JavaScript.Parser.Lexer ( dist/build/Language/JavaScript/Parser/Lexer.hs, dist/build/Language/JavaScript/Parser/Lexer.o )

src/Language/JavaScript/Parser/Lexer.x:588:19: warning: [-Wunused-matches]
    Defined but not used: ‘ap’
    |
588 | -- Syntax
    |                   ^^

templates/wrappers.hs:9:1: warning: [-Wunused-imports]
    The qualified import of ‘Control.Monad’ is redundant
      except perhaps to import instances from ‘Control.Monad’
    To import instances alone, use: import Control.Monad()
[ 6 of 12] Compiling Language.JavaScript.Parser.ParseError ( src/Language/JavaScript/Parser/ParseError.hs, dist/build/Language/JavaScript/Parser/ParseError.o )
[ 7 of 12] Compiling Language.JavaScript.Parser.AST ( src/Language/JavaScript/Parser/AST.hs, dist/build/Language/JavaScript/Parser/AST.o )
[ 8 of 12] Compiling Language.JavaScript.Parser.Grammar5 ( dist/build/Language/JavaScript/Parser/Grammar5.hs, dist/build/Language/JavaScript/Parser/Grammar5.o )
[ 9 of 12] Compiling Language.JavaScript.Parser.Parser ( src/Language/JavaScript/Parser/Parser.hs, dist/build/Language/JavaScript/Parser/Parser.o )
[10 of 12] Compiling Language.JavaScript.Pretty.Printer ( src/Language/JavaScript/Pretty/Printer.hs, dist/build/Language/JavaScript/Pretty/Printer.o )
[11 of 12] Compiling Language.JavaScript.Parser ( src/Language/JavaScript/Parser.hs, dist/build/Language/JavaScript/Parser.o )
[12 of 12] Compiling Language.JavaScript.Process.Minify ( src/Language/JavaScript/Process/Minify.hs, dist/build/Language/JavaScript/Process/Minify.o )
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181121/language-javascript-0.6.0.11-jcUMD5AjksIxnAR9KQ4Jt
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/language-javascript-0.6.0.11$ ./Setup register
Registering library for language-javascript-0.6.0.11..