The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack farmhash-0.1.0.5@sha256:908f8cb5fb2b232086254aac0fdfd0bf120fb102df716ebf4ad1352685f0d93b
Unpacked farmhash-0.1.0.5 to /tmp/stackage-build2456/farmhash-0.1.0.5/
> /tmp/stackage-build2456/farmhash-0.1.0.5$ 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/farmhash-0.1.0.5$ ./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/farmhash-0.1.0.5 --htmldir=/home/circleci/project/builds/nightly/doc/farmhash-0.1.0.5 --haddockdir=/home/circleci/project/builds/nightly/doc/farmhash-0.1.0.5
Configuring farmhash-0.1.0.5...
> /tmp/stackage-build2456/farmhash-0.1.0.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/farmhash-0.1.0.5$ ./Setup build
Preprocessing library for farmhash-0.1.0.5..
Building library for farmhash-0.1.0.5..
[1 of 2] Compiling FarmHash.Internal ( src/FarmHash/Internal.hs, dist/build/FarmHash/Internal.o )
[2 of 2] Compiling FarmHash         ( src/FarmHash.hs, dist/build/FarmHash.o )
> /tmp/stackage-build2456/farmhash-0.1.0.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/farmhash-0.1.0.5$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181116/farmhash-0.1.0.5-5Bw66jh7YdG6L16562AlWd
> /tmp/stackage-build2456/farmhash-0.1.0.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/farmhash-0.1.0.5$ ./Setup register
Registering library for farmhash-0.1.0.5..