The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack distributive-0.6@sha256:26507cf231eb10db1eb54bc358477418ce87d5077ff76c66743925fb49494b54
Unpacked distributive-0.6 to /tmp/stackage-build2454/distributive-0.6/
> /tmp/stackage-build2454/distributive-0.6$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=cabal-doctest Setup
[1 of 1] Compiling Main             ( Setup.lhs, Setup.o )
Linking Setup ...
> /tmp/stackage-build2454/distributive-0.6$ ./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/distributive-0.6 --htmldir=/home/circleci/project/builds/nightly/doc/distributive-0.6 --haddockdir=/home/circleci/project/builds/nightly/doc/distributive-0.6
Configuring distributive-0.6...
> /tmp/stackage-build2454/distributive-0.6$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=cabal-doctest Setup
> /tmp/stackage-build2454/distributive-0.6$ ./Setup build
Preprocessing library for distributive-0.6..
Building library for distributive-0.6..
[1 of 2] Compiling Data.Distributive ( src/Data/Distributive.hs, dist/build/Data/Distributive.o )
[2 of 2] Compiling Data.Distributive.Generic ( src/Data/Distributive/Generic.hs, dist/build/Data/Distributive/Generic.o )
> /tmp/stackage-build2454/distributive-0.6$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=cabal-doctest Setup
> /tmp/stackage-build2454/distributive-0.6$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/distributive-0.6-519MJtwpFMQGzhj8SnHl7q
> /tmp/stackage-build2454/distributive-0.6$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb -hide-all-packages -package=Cabal -package=base -package=cabal-doctest Setup
> /tmp/stackage-build2454/distributive-0.6$ ./Setup register
Registering library for distributive-0.6..