The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack tldr-0.4.0@sha256:6fdb51e9bb478d1fa2abd8b0d6f82713c64025ba02d799fbd4ec0345d4457458
Unpacked tldr-0.4.0 to /tmp/stackage-build2456/tldr-0.4.0/
> /tmp/stackage-build2456/tldr-0.4.0$ 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-build2456/tldr-0.4.0$ ./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/tldr-0.4.0 --htmldir=/home/circleci/project/builds/nightly/doc/tldr-0.4.0 --haddockdir=/home/circleci/project/builds/nightly/doc/tldr-0.4.0
Configuring tldr-0.4.0...
> /tmp/stackage-build2456/tldr-0.4.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/tldr-0.4.0$ ./Setup build
Preprocessing library for tldr-0.4.0..
Building library for tldr-0.4.0..
[1 of 1] Compiling Tldr             ( src/Tldr.hs, dist/build/Tldr.o )
Preprocessing executable 'tldr' for tldr-0.4.0..
Building executable 'tldr' for tldr-0.4.0..
[1 of 2] Compiling Paths_tldr       ( dist/build/tldr/autogen/Paths_tldr.hs, dist/build/tldr/tldr-tmp/Paths_tldr.o )
[2 of 2] Compiling Main             ( app/Main.hs, dist/build/tldr/tldr-tmp/Main.o )
Linking dist/build/tldr/tldr ...
> /tmp/stackage-build2456/tldr-0.4.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/tldr-0.4.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/tldr-0.4.0-Le2Y5e5EtSwBqTcLgPJNCh
Installing executable tldr in /home/circleci/project/builds/nightly/bin
> /tmp/stackage-build2456/tldr-0.4.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/tldr-0.4.0$ ./Setup register
Registering library for tldr-0.4.0..