The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack hvect-0.4.0.0@sha256:64247f03544bca3e492f9dc049855e414bfd289eb213fa389d92471b4ef40f6e
Unpacked hvect-0.4.0.0 to /tmp/stackage-build2454/hvect-0.4.0.0/
> /tmp/stackage-build2454/hvect-0.4.0.0$ 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-build2454/hvect-0.4.0.0$ ./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/hvect-0.4.0.0 --htmldir=/home/circleci/project/builds/nightly/doc/hvect-0.4.0.0 --haddockdir=/home/circleci/project/builds/nightly/doc/hvect-0.4.0.0
Configuring hvect-0.4.0.0...
> /tmp/stackage-build2454/hvect-0.4.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hvect-0.4.0.0$ ./Setup build
Preprocessing library for hvect-0.4.0.0..
Building library for hvect-0.4.0.0..
[1 of 1] Compiling Data.HVect       ( src/Data/HVect.hs, dist/build/Data/HVect.o )
> /tmp/stackage-build2454/hvect-0.4.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hvect-0.4.0.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/hvect-0.4.0.0-3dqGVvEpS5LFQ3h18xF99P
> /tmp/stackage-build2454/hvect-0.4.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hvect-0.4.0.0$ ./Setup register
Registering library for hvect-0.4.0.0..