The build is unreachable.

Build log

> /tmp/stackage-build2451$ stack unpack wai-3.2.1.2@sha256:eea52c4967d8609c2f79213d6dffe6d6601034f1471776208404781de7051410
Unpacked wai-3.2.1.2 to /tmp/stackage-build2451/wai-3.2.1.2/
> /tmp/stackage-build2451/wai-3.2.1.2$ 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-build2451/wai-3.2.1.2$ ./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/wai-3.2.1.2 --htmldir=/home/circleci/project/builds/nightly/doc/wai-3.2.1.2 --haddockdir=/home/circleci/project/builds/nightly/doc/wai-3.2.1.2
Configuring wai-3.2.1.2...
> /tmp/stackage-build2451/wai-3.2.1.2$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/wai-3.2.1.2$ ./Setup build
Preprocessing library for wai-3.2.1.2..
Building library for wai-3.2.1.2..
[1 of 2] Compiling Network.Wai.Internal ( Network/Wai/Internal.hs, dist/build/Network/Wai/Internal.o )
[2 of 2] Compiling Network.Wai      ( Network/Wai.hs, dist/build/Network/Wai.o )
> /tmp/stackage-build2451/wai-3.2.1.2$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/wai-3.2.1.2$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181119/wai-3.2.1.2-8be2LFONoYk2QS7S2Mwk0j
> /tmp/stackage-build2451/wai-3.2.1.2$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/wai-3.2.1.2$ ./Setup register
Registering library for wai-3.2.1.2..