The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack network-uri-2.6.1.0@sha256:62cc45c66023e37ef921d5fb546aca56a9c786615e05925fb193a70bf0913690
Unpacked network-uri-2.6.1.0 to /tmp/stackage-build2456/network-uri-2.6.1.0/
> /tmp/stackage-build2456/network-uri-2.6.1.0$ 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/network-uri-2.6.1.0$ ./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/network-uri-2.6.1.0 --htmldir=/home/circleci/project/builds/nightly/doc/network-uri-2.6.1.0 --haddockdir=/home/circleci/project/builds/nightly/doc/network-uri-2.6.1.0
Configuring network-uri-2.6.1.0...
> /tmp/stackage-build2456/network-uri-2.6.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/network-uri-2.6.1.0$ ./Setup build
Preprocessing library for network-uri-2.6.1.0..
Building library for network-uri-2.6.1.0..
[1 of 1] Compiling Network.URI      ( Network/URI.hs, dist/build/Network/URI.o )
> /tmp/stackage-build2456/network-uri-2.6.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/network-uri-2.6.1.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/network-uri-2.6.1.0-3QNrc5kplpDeERbGCd89z
> /tmp/stackage-build2456/network-uri-2.6.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/network-uri-2.6.1.0$ ./Setup register
Registering library for network-uri-2.6.1.0..