The build is unreachable.
Build log
> /tmp/stackage-build2456$ stack unpack rng-utils-0.3.0@sha256:a5a0075b05b92ea1b210064a48da03a55dc200e20c1b0ac539ef61d52d248aea
Unpacked rng-utils-0.3.0 to /tmp/stackage-build2456/rng-utils-0.3.0/
> /tmp/stackage-build2456/rng-utils-0.3.0$ 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/rng-utils-0.3.0$ ./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/rng-utils-0.3.0 --htmldir=/home/circleci/project/builds/nightly/doc/rng-utils-0.3.0 --haddockdir=/home/circleci/project/builds/nightly/doc/rng-utils-0.3.0
Configuring rng-utils-0.3.0...
> /tmp/stackage-build2456/rng-utils-0.3.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/rng-utils-0.3.0$ ./Setup build
Preprocessing library for rng-utils-0.3.0..
Building library for rng-utils-0.3.0..
[1 of 1] Compiling Data.RNG ( src/Data/RNG.hs, dist/build/Data/RNG.o )
> /tmp/stackage-build2456/rng-utils-0.3.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/rng-utils-0.3.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181116/rng-utils-0.3.0-8Ea8ZPHbtBE9TR6AwQeHDp
> /tmp/stackage-build2456/rng-utils-0.3.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/rng-utils-0.3.0$ ./Setup register
Registering library for rng-utils-0.3.0..