The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack githash-0.1.2.0@sha256:800750160748becd557f4fedd737f998c2d714f4e761ea8f302139ad1d28ac82
Unpacked githash-0.1.2.0 to /tmp/stackage-build2452/githash-0.1.2.0/
> /tmp/stackage-build2452/githash-0.1.2.0$ 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-build2452/githash-0.1.2.0$ ./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/githash-0.1.2.0 --htmldir=/home/circleci/project/builds/nightly/doc/githash-0.1.2.0 --haddockdir=/home/circleci/project/builds/nightly/doc/githash-0.1.2.0
Configuring githash-0.1.2.0...
> /tmp/stackage-build2452/githash-0.1.2.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/githash-0.1.2.0$ ./Setup build
Preprocessing library for githash-0.1.2.0..
Building library for githash-0.1.2.0..
[1 of 2] Compiling GitHash          ( src/GitHash.hs, dist/build/GitHash.o )
[2 of 2] Compiling Paths_githash    ( dist/build/autogen/Paths_githash.hs, dist/build/Paths_githash.o )
> /tmp/stackage-build2452/githash-0.1.2.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/githash-0.1.2.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/githash-0.1.2.0-58EZs6DUlUS6aOjbungtI9
> /tmp/stackage-build2452/githash-0.1.2.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/githash-0.1.2.0$ ./Setup register
Registering library for githash-0.1.2.0..