The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack cache-0.1.1.1@sha256:f200339694cf1798ec86ef260c49da8c11b911873ca26a347ee54012d06ec4fe
Unpacked cache-0.1.1.1 to /tmp/stackage-build2454/cache-0.1.1.1/
> /tmp/stackage-build2454/cache-0.1.1.1$ 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/cache-0.1.1.1$ ./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/cache-0.1.1.1 --htmldir=/home/circleci/project/builds/nightly/doc/cache-0.1.1.1 --haddockdir=/home/circleci/project/builds/nightly/doc/cache-0.1.1.1
Configuring cache-0.1.1.1...
> /tmp/stackage-build2454/cache-0.1.1.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/cache-0.1.1.1$ ./Setup build
Preprocessing library for cache-0.1.1.1..
Building library for cache-0.1.1.1..
[1 of 2] Compiling Data.Cache.Internal ( src/Data/Cache/Internal.hs, dist/build/Data/Cache/Internal.o )
[2 of 2] Compiling Data.Cache       ( src/Data/Cache.hs, dist/build/Data/Cache.o )
> /tmp/stackage-build2454/cache-0.1.1.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/cache-0.1.1.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/cache-0.1.1.1-3nB8ex9qrxYH441Du4sySc
> /tmp/stackage-build2454/cache-0.1.1.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/cache-0.1.1.1$ ./Setup register
Registering library for cache-0.1.1.1..