The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack ilist-0.3.1.0@sha256:607a6b45b369162fb393a14e51d9d40918e53a4809991dc6b50cd601f1ede9bf
Unpacked ilist-0.3.1.0 to /tmp/stackage-build2454/ilist-0.3.1.0/
> /tmp/stackage-build2454/ilist-0.3.1.0$ 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-build2454/ilist-0.3.1.0$ ./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/ilist-0.3.1.0 --htmldir=/home/circleci/project/builds/nightly/doc/ilist-0.3.1.0 --haddockdir=/home/circleci/project/builds/nightly/doc/ilist-0.3.1.0
Configuring ilist-0.3.1.0...
> /tmp/stackage-build2454/ilist-0.3.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/ilist-0.3.1.0$ ./Setup build
Preprocessing library for ilist-0.3.1.0..
Building library for ilist-0.3.1.0..
[1 of 1] Compiling Data.List.Index  ( lib/Data/List/Index.hs, dist/build/Data/List/Index.o )

lib/Data/List/Index.hs:87:1: warning: [-Wunused-imports]
    The import of ‘Data.Monoid’ is redundant
      except perhaps to import instances from ‘Data.Monoid’
    To import instances alone, use: import Data.Monoid()
   |
87 | import Data.Monoid
   | ^^^^^^^^^^^^^^^^^^
> /tmp/stackage-build2454/ilist-0.3.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/ilist-0.3.1.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181116/ilist-0.3.1.0-3sRJ5L7mE5W2k7Gmp2Z7TB
> /tmp/stackage-build2454/ilist-0.3.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/ilist-0.3.1.0$ ./Setup register
Registering library for ilist-0.3.1.0..