The build is unreachable.
Build log
> /tmp/stackage-build2454$ stack unpack immortal-0.3@sha256:a84c83c876fac7e45548f713db4b5c10ea4ad73a75978b8bc354f79313bd6754
Unpacked immortal-0.3 to /tmp/stackage-build2454/immortal-0.3/
> /tmp/stackage-build2454/immortal-0.3$ 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-build2454/immortal-0.3$ ./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/immortal-0.3 --htmldir=/home/circleci/project/builds/nightly/doc/immortal-0.3 --haddockdir=/home/circleci/project/builds/nightly/doc/immortal-0.3
Configuring immortal-0.3...
> /tmp/stackage-build2454/immortal-0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/immortal-0.3$ ./Setup build
Preprocessing library for immortal-0.3..
Building library for immortal-0.3..
[1 of 1] Compiling Control.Immortal ( src/Control/Immortal.hs, dist/build/Control/Immortal.o )
> /tmp/stackage-build2454/immortal-0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/immortal-0.3$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/immortal-0.3-738X0mnKZ6AGf0HyTlPU20
> /tmp/stackage-build2454/immortal-0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/immortal-0.3$ ./Setup register
Registering library for immortal-0.3..