The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack commutative-0.0.1.4@sha256:5efa1a56a503d1f51e25109064ead1068e00cb360968435bc10978e9e0331f34
Unpacked commutative-0.0.1.4 to /tmp/stackage-build2452/commutative-0.0.1.4/
> /tmp/stackage-build2452/commutative-0.0.1.4$ 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/commutative-0.0.1.4$ ./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/commutative-0.0.1.4 --htmldir=/home/circleci/project/builds/nightly/doc/commutative-0.0.1.4 --haddockdir=/home/circleci/project/builds/nightly/doc/commutative-0.0.1.4
Configuring commutative-0.0.1.4...
> /tmp/stackage-build2452/commutative-0.0.1.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/commutative-0.0.1.4$ ./Setup build
Preprocessing library for commutative-0.0.1.4..
Building library for commutative-0.0.1.4..
[1 of 2] Compiling Data.Commutative ( src/Data/Commutative.hs, dist/build/Data/Commutative.o )

src/Data/Commutative.hs:15:1: warning: [-Wunused-imports]
    The import of ‘Control.Applicative’ is redundant
      except perhaps to import instances from ‘Control.Applicative’
    To import instances alone, use: import Control.Applicative()
   |
15 | import Control.Applicative
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[2 of 2] Compiling Data.Mergeable   ( src/Data/Mergeable.hs, dist/build/Data/Mergeable.o )
> /tmp/stackage-build2452/commutative-0.0.1.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/commutative-0.0.1.4$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181113/commutative-0.0.1.4-4iuYEx6U7A9Kmn9ZWUAwSx
> /tmp/stackage-build2452/commutative-0.0.1.4$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/commutative-0.0.1.4$ ./Setup register
Registering library for commutative-0.0.1.4..