The build is unreachable.

Build log

> /tmp/stackage-build2453$ stack unpack titlecase-1.0.1@sha256:f6659103b3befe9da3ff6901db75c916434b78fd6c7f873e8280841a69d9b238
Unpacked titlecase-1.0.1 to /tmp/stackage-build2453/titlecase-1.0.1/
> /tmp/stackage-build2453/titlecase-1.0.1$ 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/titlecase-1.0.1$ ./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/titlecase-1.0.1 --htmldir=/home/circleci/project/builds/nightly/doc/titlecase-1.0.1 --haddockdir=/home/circleci/project/builds/nightly/doc/titlecase-1.0.1
Configuring titlecase-1.0.1...
> /tmp/stackage-build2453/titlecase-1.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/titlecase-1.0.1$ ./Setup build
Preprocessing library for titlecase-1.0.1..
Building library for titlecase-1.0.1..
[1 of 3] Compiling Data.Text.Titlecase.Internal ( src/Data/Text/Titlecase/Internal.hs, dist/build/Data/Text/Titlecase/Internal.o )
[2 of 3] Compiling Data.Text.Titlecase ( src/Data/Text/Titlecase.hs, dist/build/Data/Text/Titlecase.o )
[3 of 3] Compiling Paths_titlecase  ( dist/build/autogen/Paths_titlecase.hs, dist/build/Paths_titlecase.o )
Preprocessing executable 'titlecase' for titlecase-1.0.1..
Building executable 'titlecase' for titlecase-1.0.1..
[1 of 1] Compiling Main             ( Main.hs, dist/build/titlecase/titlecase-tmp/Main.o )
Linking dist/build/titlecase/titlecase ...
> /tmp/stackage-build2453/titlecase-1.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/titlecase-1.0.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181120/titlecase-1.0.1-DJlyvtpNhEdFtIto3s3fQp
Installing executable titlecase in /home/circleci/project/builds/nightly/bin
> /tmp/stackage-build2453/titlecase-1.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/titlecase-1.0.1$ ./Setup register
Registering library for titlecase-1.0.1..