The build is unreachable.

Build log

> /tmp/stackage-build2453$ stack unpack pem-0.2.4@sha256:cc8e62118b783e284dc0fa032f54fe386a3861a948ec88079370a433c103a705
Unpacked pem-0.2.4 to /tmp/stackage-build2453/pem-0.2.4/
> /tmp/stackage-build2453/pem-0.2.4$ 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/pem-0.2.4$ ./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/pem-0.2.4 --htmldir=/home/circleci/project/builds/nightly/doc/pem-0.2.4 --haddockdir=/home/circleci/project/builds/nightly/doc/pem-0.2.4
Configuring pem-0.2.4...
> /tmp/stackage-build2453/pem-0.2.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/pem-0.2.4$ ./Setup build
Preprocessing library for pem-0.2.4..
Building library for pem-0.2.4..
[1 of 4] Compiling Data.PEM.Types   ( Data/PEM/Types.hs, dist/build/Data/PEM/Types.o )
[2 of 4] Compiling Data.PEM.Parser  ( Data/PEM/Parser.hs, dist/build/Data/PEM/Parser.o )
[3 of 4] Compiling Data.PEM.Writer  ( Data/PEM/Writer.hs, dist/build/Data/PEM/Writer.o )
[4 of 4] Compiling Data.PEM         ( Data/PEM.hs, dist/build/Data/PEM.o )
> /tmp/stackage-build2453/pem-0.2.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/pem-0.2.4$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181115/pem-0.2.4-EezZdV4k2PdHGw4BoKDCIz
> /tmp/stackage-build2453/pem-0.2.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/pem-0.2.4$ ./Setup register
Registering library for pem-0.2.4..