The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack pretty-types-0.2.3.1@sha256:5e4b9a3345f4c38fbae84861aa8b684f0ae6b9c21c38eb316129b7ac1b63b770
Unpacked pretty-types-0.2.3.1 to /tmp/stackage-build2456/pretty-types-0.2.3.1/
> /tmp/stackage-build2456/pretty-types-0.2.3.1$ 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-build2456/pretty-types-0.2.3.1$ ./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/pretty-types-0.2.3.1 --htmldir=/home/circleci/project/builds/nightly/doc/pretty-types-0.2.3.1 --haddockdir=/home/circleci/project/builds/nightly/doc/pretty-types-0.2.3.1
Configuring pretty-types-0.2.3.1...
> /tmp/stackage-build2456/pretty-types-0.2.3.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/pretty-types-0.2.3.1$ ./Setup build
Preprocessing library for pretty-types-0.2.3.1..
Building library for pretty-types-0.2.3.1..
[1 of 1] Compiling Data.Type.Pretty ( src/Data/Type/Pretty.hs, dist/build/Data/Type/Pretty.o )
> /tmp/stackage-build2456/pretty-types-0.2.3.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/pretty-types-0.2.3.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181116/pretty-types-0.2.3.1-1eJWFOlp1qAGGZgGaBplQm
> /tmp/stackage-build2456/pretty-types-0.2.3.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/pretty-types-0.2.3.1$ ./Setup register
Registering library for pretty-types-0.2.3.1..