The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack justified-containers-0.3.0.0@sha256:1345a6a34754818950d49c318ec0075f7a39462b4044dc988b072541a75148e0
Unpacked justified-containers-0.3.0.0 to /tmp/stackage-build2456/justified-containers-0.3.0.0/
> /tmp/stackage-build2456/justified-containers-0.3.0.0$ 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/justified-containers-0.3.0.0$ ./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/justified-containers-0.3.0.0 --htmldir=/home/circleci/project/builds/nightly/doc/justified-containers-0.3.0.0 --haddockdir=/home/circleci/project/builds/nightly/doc/justified-containers-0.3.0.0
Configuring justified-containers-0.3.0.0...
> /tmp/stackage-build2456/justified-containers-0.3.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/justified-containers-0.3.0.0$ ./Setup build
Preprocessing library for justified-containers-0.3.0.0..
Building library for justified-containers-0.3.0.0..
[1 of 2] Compiling Data.Map.Justified ( src/Data/Map/Justified.hs, dist/build/Data/Map/Justified.o )
[2 of 2] Compiling Data.Map.Justified.Tutorial ( src/Data/Map/Justified/Tutorial.hs, dist/build/Data/Map/Justified/Tutorial.o )

src/Data/Map/Justified/Tutorial.hs:39:1: warning: [-Wunused-imports]
    The import of ‘Data.Type.Coercion’ is redundant
      except perhaps to import instances from ‘Data.Type.Coercion’
    To import instances alone, use: import Data.Type.Coercion()
   |
39 | import Data.Type.Coercion
   | ^^^^^^^^^^^^^^^^^^^^^^^^^
> /tmp/stackage-build2456/justified-containers-0.3.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/justified-containers-0.3.0.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181116/justified-containers-0.3.0.0-QwQWf1ossWJ9BbDcxnzmi
> /tmp/stackage-build2456/justified-containers-0.3.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/justified-containers-0.3.0.0$ ./Setup register
Registering library for justified-containers-0.3.0.0..