The build is unreachable.

Build log

> /tmp/stackage-build2453$ stack unpack appendmap-0.1.5@sha256:1c150f734016276c580de7064d620d86f4793603c0d5c7f2724c6b5f0fcaf316
Unpacked appendmap-0.1.5 to /tmp/stackage-build2453/appendmap-0.1.5/
> /tmp/stackage-build2453/appendmap-0.1.5$ 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/appendmap-0.1.5$ ./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/appendmap-0.1.5 --htmldir=/home/circleci/project/builds/nightly/doc/appendmap-0.1.5 --haddockdir=/home/circleci/project/builds/nightly/doc/appendmap-0.1.5
Configuring appendmap-0.1.5...
> /tmp/stackage-build2453/appendmap-0.1.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/appendmap-0.1.5$ ./Setup build
Preprocessing library for appendmap-0.1.5..
Building library for appendmap-0.1.5..
[1 of 5] Compiling Data.Map.Append.Lazy ( src/Data/Map/Append/Lazy.hs, dist/build/Data/Map/Append/Lazy.o )
[2 of 5] Compiling Data.Map.Append  ( src/Data/Map/Append.hs, dist/build/Data/Map/Append.o )
[3 of 5] Compiling Data.Map.Append.Strict ( src/Data/Map/Append/Strict.hs, dist/build/Data/Map/Append/Strict.o )
[4 of 5] Compiling Data.Map.Counter ( src/Data/Map/Counter.hs, dist/build/Data/Map/Counter.o )
[5 of 5] Compiling Paths_appendmap  ( dist/build/autogen/Paths_appendmap.hs, dist/build/Paths_appendmap.o )
> /tmp/stackage-build2453/appendmap-0.1.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/appendmap-0.1.5$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181115/appendmap-0.1.5-G5ddt2rRQb9Ga8awSkXtwf
> /tmp/stackage-build2453/appendmap-0.1.5$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/appendmap-0.1.5$ ./Setup register
Registering library for appendmap-0.1.5..