The build is unreachable.
Build log
> /tmp/stackage-build2453$ stack unpack say-0.1.0.1@sha256:f20554ed3bcc198965a934385fbd98f9fd9754705f06eb2ee2b13a9b2c530632
Unpacked say-0.1.0.1 to /tmp/stackage-build2453/say-0.1.0.1/
> /tmp/stackage-build2453/say-0.1.0.1$ 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/say-0.1.0.1$ ./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/say-0.1.0.1 --htmldir=/home/circleci/project/builds/nightly/doc/say-0.1.0.1 --haddockdir=/home/circleci/project/builds/nightly/doc/say-0.1.0.1
Configuring say-0.1.0.1...
> /tmp/stackage-build2453/say-0.1.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/say-0.1.0.1$ ./Setup build
Preprocessing library for say-0.1.0.1..
Building library for say-0.1.0.1..
[1 of 2] Compiling Paths_say ( dist/build/autogen/Paths_say.hs, dist/build/Paths_say.o )
[2 of 2] Compiling Say ( src/Say.hs, dist/build/Say.o )
> /tmp/stackage-build2453/say-0.1.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/say-0.1.0.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181118/say-0.1.0.1-AnIFK0nMQ1lAod2sr7GxaP
> /tmp/stackage-build2453/say-0.1.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/say-0.1.0.1$ ./Setup register
Registering library for say-0.1.0.1..