The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack hashable-1.2.7.0@sha256:03b6836ca9cd3ad0e5a2f3cce989b001dd0e05f306a873db3196037adb30e0a4
Unpacked hashable-1.2.7.0 to /tmp/stackage-build2454/hashable-1.2.7.0/
> /tmp/stackage-build2454/hashable-1.2.7.0$ 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/hashable-1.2.7.0$ ./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/hashable-1.2.7.0 --htmldir=/home/circleci/project/builds/nightly/doc/hashable-1.2.7.0 --haddockdir=/home/circleci/project/builds/nightly/doc/hashable-1.2.7.0
Configuring hashable-1.2.7.0...
> /tmp/stackage-build2454/hashable-1.2.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hashable-1.2.7.0$ ./Setup build
Preprocessing library for hashable-1.2.7.0..
Building library for hashable-1.2.7.0..
[1 of 4] Compiling Data.Hashable.Class ( Data/Hashable/Class.hs, dist/build/Data/Hashable/Class.o )
[2 of 4] Compiling Data.Hashable.Generic ( Data/Hashable/Generic.hs, dist/build/Data/Hashable/Generic.o )
[3 of 4] Compiling Data.Hashable    ( Data/Hashable.hs, dist/build/Data/Hashable.o )
[4 of 4] Compiling Data.Hashable.Lifted ( Data/Hashable/Lifted.hs, dist/build/Data/Hashable/Lifted.o )
> /tmp/stackage-build2454/hashable-1.2.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hashable-1.2.7.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/hashable-1.2.7.0-FGbsObIXEH56Fc6TD0JU61
> /tmp/stackage-build2454/hashable-1.2.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hashable-1.2.7.0$ ./Setup register
Registering library for hashable-1.2.7.0..