The build is unreachable.

Build log

> /tmp/stackage-build2453$ stack unpack path-pieces-0.2.1@sha256:c713a8d04b3e6b89f1116c1d5fe434305031e17a9f0ad30a457a8402e1d5fc5c
Unpacked path-pieces-0.2.1 to /tmp/stackage-build2453/path-pieces-0.2.1/
> /tmp/stackage-build2453/path-pieces-0.2.1$ 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-build2453/path-pieces-0.2.1$ ./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/path-pieces-0.2.1 --htmldir=/home/circleci/project/builds/nightly/doc/path-pieces-0.2.1 --haddockdir=/home/circleci/project/builds/nightly/doc/path-pieces-0.2.1
Configuring path-pieces-0.2.1...
> /tmp/stackage-build2453/path-pieces-0.2.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/path-pieces-0.2.1$ ./Setup build
Preprocessing library for path-pieces-0.2.1..
Building library for path-pieces-0.2.1..
[1 of 1] Compiling Web.PathPieces   ( Web/PathPieces.hs, dist/build/Web/PathPieces.o )
> /tmp/stackage-build2453/path-pieces-0.2.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/path-pieces-0.2.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181120/path-pieces-0.2.1-B9Ol5lTUJon4533DN4AewL
> /tmp/stackage-build2453/path-pieces-0.2.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/path-pieces-0.2.1$ ./Setup register
Registering library for path-pieces-0.2.1..