The build is unreachable.
Build log
> /tmp/stackage-build2451$ stack unpack scanner-0.3@sha256:6aaf7e9a247ba1e7dad0a191ae82cfbdc61e6be727419aeb765f08196c3cc32f
Unpacked scanner-0.3 to /tmp/stackage-build2451/scanner-0.3/
> /tmp/stackage-build2451/scanner-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-build2451/scanner-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/scanner-0.3 --htmldir=/home/circleci/project/builds/nightly/doc/scanner-0.3 --haddockdir=/home/circleci/project/builds/nightly/doc/scanner-0.3
Configuring scanner-0.3...
> /tmp/stackage-build2451/scanner-0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/scanner-0.3$ ./Setup build
Preprocessing library for scanner-0.3..
Building library for scanner-0.3..
[1 of 5] Compiling Prelude ( compat/Prelude.hs, dist/build/Prelude.o )
[2 of 5] Compiling Data.Either ( compat/Data/Either.hs, dist/build/Data/Either.o )
[3 of 5] Compiling Scanner.OctetPredicates ( lib/Scanner/OctetPredicates.hs, dist/build/Scanner/OctetPredicates.o )
[4 of 5] Compiling Scanner.Internal ( lib/Scanner/Internal.hs, dist/build/Scanner/Internal.o )
[5 of 5] Compiling Scanner ( lib/Scanner.hs, dist/build/Scanner.o )
> /tmp/stackage-build2451/scanner-0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/scanner-0.3$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181121/scanner-0.3-8TxnYkhZmUo90nNRx7KybV
> /tmp/stackage-build2451/scanner-0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/scanner-0.3$ ./Setup register
Registering library for scanner-0.3..