The build is unreachable.

Build log

> /tmp/stackage-build2451$ stack unpack temporary-1.3@sha256:3a66c136f700dbf42f3c5000ca93e80b26dead51e54322c83272b236c1ec8ef1
Unpacked temporary-1.3 to /tmp/stackage-build2451/temporary-1.3/
> /tmp/stackage-build2451/temporary-1.3$ 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-build2451/temporary-1.3$ ./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/temporary-1.3 --htmldir=/home/circleci/project/builds/nightly/doc/temporary-1.3 --haddockdir=/home/circleci/project/builds/nightly/doc/temporary-1.3
Configuring temporary-1.3...
> /tmp/stackage-build2451/temporary-1.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/temporary-1.3$ ./Setup build
Preprocessing library for temporary-1.3..
Building library for temporary-1.3..
[1 of 1] Compiling System.IO.Temp   ( System/IO/Temp.hs, dist/build/System/IO/Temp.o )
> /tmp/stackage-build2451/temporary-1.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/temporary-1.3$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181121/temporary-1.3-KSl9hwjwoIL3tvjQu6jK8W
> /tmp/stackage-build2451/temporary-1.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/temporary-1.3$ ./Setup register
Registering library for temporary-1.3..