The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack enclosed-exceptions-1.0.3@sha256:6d4e9b5156721ccfa62d3cdcbf13d8571773031050ec714cb55b841f0c183f6a
Unpacked enclosed-exceptions-1.0.3 to /tmp/stackage-build2452/enclosed-exceptions-1.0.3/
> /tmp/stackage-build2452/enclosed-exceptions-1.0.3$ 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-build2452/enclosed-exceptions-1.0.3$ ./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/enclosed-exceptions-1.0.3 --htmldir=/home/circleci/project/builds/nightly/doc/enclosed-exceptions-1.0.3 --haddockdir=/home/circleci/project/builds/nightly/doc/enclosed-exceptions-1.0.3
Configuring enclosed-exceptions-1.0.3...
> /tmp/stackage-build2452/enclosed-exceptions-1.0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/enclosed-exceptions-1.0.3$ ./Setup build
Preprocessing library for enclosed-exceptions-1.0.3..
Building library for enclosed-exceptions-1.0.3..
[1 of 1] Compiling Control.Exception.Enclosed ( src/Control/Exception/Enclosed.hs, dist/build/Control/Exception/Enclosed.o )
> /tmp/stackage-build2452/enclosed-exceptions-1.0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/enclosed-exceptions-1.0.3$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/enclosed-exceptions-1.0.3-CxpMUvIfbB5AbqcMQpWmer
> /tmp/stackage-build2452/enclosed-exceptions-1.0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/enclosed-exceptions-1.0.3$ ./Setup register
Registering library for enclosed-exceptions-1.0.3..