The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack nondeterminism-1.4@sha256:56598728aff2900c8b1d0002c1bd35420bc25289db094b73fdbfd33ddce8f8a9
Unpacked nondeterminism-1.4 to /tmp/stackage-build2452/nondeterminism-1.4/
> /tmp/stackage-build2452/nondeterminism-1.4$ 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-build2452/nondeterminism-1.4$ ./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/nondeterminism-1.4 --htmldir=/home/circleci/project/builds/nightly/doc/nondeterminism-1.4 --haddockdir=/home/circleci/project/builds/nightly/doc/nondeterminism-1.4
Configuring nondeterminism-1.4...
> /tmp/stackage-build2452/nondeterminism-1.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/nondeterminism-1.4$ ./Setup build
Preprocessing library for nondeterminism-1.4..
Building library for nondeterminism-1.4..
[1 of 1] Compiling Control.Monad.Amb ( src/Control/Monad/Amb.hs, dist/build/Control/Monad/Amb.o )
> /tmp/stackage-build2452/nondeterminism-1.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/nondeterminism-1.4$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181113/nondeterminism-1.4-hePqccaite5dLdOErVG7e
> /tmp/stackage-build2452/nondeterminism-1.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/nondeterminism-1.4$ ./Setup register
Registering library for nondeterminism-1.4..