The build is unreachable.
Build log
> /tmp/stackage-build2452$ stack unpack unicode-show-0.1.0.3@sha256:fbe71707a6a23ba9291913b23c71773efa6071e47008943ab86fcd43829d896b
Unpacked unicode-show-0.1.0.3 to /tmp/stackage-build2452/unicode-show-0.1.0.3/
> /tmp/stackage-build2452/unicode-show-0.1.0.3$ 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/unicode-show-0.1.0.3$ ./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/unicode-show-0.1.0.3 --htmldir=/home/circleci/project/builds/nightly/doc/unicode-show-0.1.0.3 --haddockdir=/home/circleci/project/builds/nightly/doc/unicode-show-0.1.0.3
Configuring unicode-show-0.1.0.3...
> /tmp/stackage-build2452/unicode-show-0.1.0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/unicode-show-0.1.0.3$ ./Setup build
Preprocessing library for unicode-show-0.1.0.3..
Building library for unicode-show-0.1.0.3..
[1 of 1] Compiling Text.Show.Unicode ( src/Text/Show/Unicode.hs, dist/build/Text/Show/Unicode.o )
> /tmp/stackage-build2452/unicode-show-0.1.0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/unicode-show-0.1.0.3$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181119/unicode-show-0.1.0.3-E42BjzqrCwr19xsyZVjnik
> /tmp/stackage-build2452/unicode-show-0.1.0.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/unicode-show-0.1.0.3$ ./Setup register
Registering library for unicode-show-0.1.0.3..