The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack bbdb-0.8@sha256:c339562e980b8dcabe8142ac63b0e6c1cd0de0470fedaa19249641e84c505fc2
Unpacked bbdb-0.8 to /tmp/stackage-build2454/bbdb-0.8/
> /tmp/stackage-build2454/bbdb-0.8$ 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/bbdb-0.8$ ./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/bbdb-0.8 --htmldir=/home/circleci/project/builds/nightly/doc/bbdb-0.8 --haddockdir=/home/circleci/project/builds/nightly/doc/bbdb-0.8
Configuring bbdb-0.8...
> /tmp/stackage-build2454/bbdb-0.8$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/bbdb-0.8$ ./Setup build
Preprocessing library for bbdb-0.8..
Building library for bbdb-0.8..
[1 of 1] Compiling Database.BBDB    ( src/Database/BBDB.hs, dist/build/Database/BBDB.o )
> /tmp/stackage-build2454/bbdb-0.8$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/bbdb-0.8$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/bbdb-0.8-G6m9ZPb0yt3EuLwbcF9xYp
> /tmp/stackage-build2454/bbdb-0.8$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/bbdb-0.8$ ./Setup register
Registering library for bbdb-0.8..