The build is unreachable.

Build log

> /tmp/stackage-build2451$ stack unpack fold-debounce-0.2.0.8@sha256:223a1270ecb7e8482631777e582c3c7c9b9d5c5c5d5af5c90ba3d69b002ea810
Unpacked fold-debounce-0.2.0.8 to /tmp/stackage-build2451/fold-debounce-0.2.0.8/
> /tmp/stackage-build2451/fold-debounce-0.2.0.8$ 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-build2451/fold-debounce-0.2.0.8$ ./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/fold-debounce-0.2.0.8 --htmldir=/home/circleci/project/builds/nightly/doc/fold-debounce-0.2.0.8 --haddockdir=/home/circleci/project/builds/nightly/doc/fold-debounce-0.2.0.8
Configuring fold-debounce-0.2.0.8...
> /tmp/stackage-build2451/fold-debounce-0.2.0.8$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/fold-debounce-0.2.0.8$ ./Setup build
Preprocessing library for fold-debounce-0.2.0.8..
Building library for fold-debounce-0.2.0.8..
[1 of 1] Compiling Control.FoldDebounce ( src/Control/FoldDebounce.hs, dist/build/Control/FoldDebounce.o )
> /tmp/stackage-build2451/fold-debounce-0.2.0.8$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/fold-debounce-0.2.0.8$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181119/fold-debounce-0.2.0.8-98MWXCCCe2bD5OCwvxgZd1
> /tmp/stackage-build2451/fold-debounce-0.2.0.8$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/fold-debounce-0.2.0.8$ ./Setup register
Registering library for fold-debounce-0.2.0.8..