The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack kdt-0.2.4@sha256:b16a2bdab7fcdb220c435f95a6c99ca8e28d6eb7d7f73e3aa289e59f7b024b78
Unpacked kdt-0.2.4 to /tmp/stackage-build2456/kdt-0.2.4/
> /tmp/stackage-build2456/kdt-0.2.4$ 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-build2456/kdt-0.2.4$ ./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/kdt-0.2.4 --htmldir=/home/circleci/project/builds/nightly/doc/kdt-0.2.4 --haddockdir=/home/circleci/project/builds/nightly/doc/kdt-0.2.4
Configuring kdt-0.2.4...
> /tmp/stackage-build2456/kdt-0.2.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/kdt-0.2.4$ ./Setup build
Preprocessing library for kdt-0.2.4..
Building library for kdt-0.2.4..
[1 of 4] Compiling Data.KdMap.Static ( lib-src/Data/KdMap/Static.hs, dist/build/Data/KdMap/Static.o )
[2 of 4] Compiling Data.KdMap.Dynamic ( lib-src/Data/KdMap/Dynamic.hs, dist/build/Data/KdMap/Dynamic.o )
[3 of 4] Compiling Data.KdTree.Dynamic ( lib-src/Data/KdTree/Dynamic.hs, dist/build/Data/KdTree/Dynamic.o )
[4 of 4] Compiling Data.KdTree.Static ( lib-src/Data/KdTree/Static.hs, dist/build/Data/KdTree/Static.o )
> /tmp/stackage-build2456/kdt-0.2.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/kdt-0.2.4$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181116/kdt-0.2.4-9l1NarqDqKfFwU5gvd6TP7
> /tmp/stackage-build2456/kdt-0.2.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/kdt-0.2.4$ ./Setup register
Registering library for kdt-0.2.4..