The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack boxes-0.1.5@sha256:fa1b39569777bc4c1ccb1b847808d0a637b5a118c26b8f63f54f348eda03eebe
Unpacked boxes-0.1.5 to /tmp/stackage-build2456/boxes-0.1.5/
> /tmp/stackage-build2456/boxes-0.1.5$ 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-build2456/boxes-0.1.5$ ./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/boxes-0.1.5 --htmldir=/home/circleci/project/builds/nightly/doc/boxes-0.1.5 --haddockdir=/home/circleci/project/builds/nightly/doc/boxes-0.1.5
Configuring boxes-0.1.5...
> /tmp/stackage-build2456/boxes-0.1.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/boxes-0.1.5$ ./Setup build
Preprocessing library for boxes-0.1.5..
Building library for boxes-0.1.5..
[1 of 1] Compiling Text.PrettyPrint.Boxes ( Text/PrettyPrint/Boxes.hs, dist/build/Text/PrettyPrint/Boxes.o )
> /tmp/stackage-build2456/boxes-0.1.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/boxes-0.1.5$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/boxes-0.1.5-6io6BrPg87q1hhW2bdiQAI
> /tmp/stackage-build2456/boxes-0.1.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/boxes-0.1.5$ ./Setup register
Registering library for boxes-0.1.5..