The build is unreachable.

Build log

> /tmp/stackage-build2453$ stack unpack bimap-0.3.3@sha256:232518c0410990665b9c8677eb9318ee355c001d58945ddcbedec3baa30b4160
Unpacked bimap-0.3.3 to /tmp/stackage-build2453/bimap-0.3.3/
> /tmp/stackage-build2453/bimap-0.3.3$ 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-build2453/bimap-0.3.3$ ./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/bimap-0.3.3 --htmldir=/home/circleci/project/builds/nightly/doc/bimap-0.3.3 --haddockdir=/home/circleci/project/builds/nightly/doc/bimap-0.3.3
Configuring bimap-0.3.3...
> /tmp/stackage-build2453/bimap-0.3.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/bimap-0.3.3$ ./Setup build
Preprocessing library for bimap-0.3.3..
Building library for bimap-0.3.3..
[1 of 1] Compiling Data.Bimap       ( Data/Bimap.hs, dist/build/Data/Bimap.o )
> /tmp/stackage-build2453/bimap-0.3.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/bimap-0.3.3$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181120/bimap-0.3.3-7LncXGOqFKQA7CoSv2XWGx
> /tmp/stackage-build2453/bimap-0.3.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/bimap-0.3.3$ ./Setup register
Registering library for bimap-0.3.3..