The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack regex-applicative-0.3.3@sha256:32129b4f0b2a3d370fb182dea4a2ee13aa127285f358f2f2224ffe982581df82
Unpacked regex-applicative-0.3.3 to /tmp/stackage-build2456/regex-applicative-0.3.3/
> /tmp/stackage-build2456/regex-applicative-0.3.3$ 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-build2456/regex-applicative-0.3.3$ ./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/regex-applicative-0.3.3 --htmldir=/home/circleci/project/builds/nightly/doc/regex-applicative-0.3.3 --haddockdir=/home/circleci/project/builds/nightly/doc/regex-applicative-0.3.3
Configuring regex-applicative-0.3.3...
> /tmp/stackage-build2456/regex-applicative-0.3.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/regex-applicative-0.3.3$ ./Setup build
Preprocessing library for regex-applicative-0.3.3..
Building library for regex-applicative-0.3.3..
[1 of 8] Compiling Text.Regex.Applicative.StateQueue ( Text/Regex/Applicative/StateQueue.hs, dist/build/Text/Regex/Applicative/StateQueue.o )
[2 of 8] Compiling Text.Regex.Applicative.Types ( Text/Regex/Applicative/Types.hs, dist/build/Text/Regex/Applicative/Types.o )
[3 of 8] Compiling Text.Regex.Applicative.Reference ( Text/Regex/Applicative/Reference.hs, dist/build/Text/Regex/Applicative/Reference.o )
[4 of 8] Compiling Text.Regex.Applicative.Compile ( Text/Regex/Applicative/Compile.hs, dist/build/Text/Regex/Applicative/Compile.o )

Text/Regex/Applicative/Compile.hs:7:1: 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()
  |
7 | import Control.Applicative
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[5 of 8] Compiling Text.Regex.Applicative.Object ( Text/Regex/Applicative/Object.hs, dist/build/Text/Regex/Applicative/Object.o )

Text/Regex/Applicative/Object.hs:37:1: 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()
   |
37 | import Control.Applicative hiding (empty)
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[6 of 8] Compiling Text.Regex.Applicative.Interface ( Text/Regex/Applicative/Interface.hs, dist/build/Text/Regex/Applicative/Interface.o )

Text/Regex/Applicative/Interface.hs:7:1: warning: [-Wunused-imports]
    The import of ‘Data.Traversable’ is redundant
      except perhaps to import instances from ‘Data.Traversable’
    To import instances alone, use: import Data.Traversable()
  |
7 | import Data.Traversable
  | ^^^^^^^^^^^^^^^^^^^^^^^
[7 of 8] Compiling Text.Regex.Applicative ( Text/Regex/Applicative.hs, dist/build/Text/Regex/Applicative.o )
[8 of 8] Compiling Text.Regex.Applicative.Common ( Text/Regex/Applicative/Common.hs, dist/build/Text/Regex/Applicative/Common.o )
> /tmp/stackage-build2456/regex-applicative-0.3.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/regex-applicative-0.3.3$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/regex-applicative-0.3.3-I3rRNj55s533YYKiqKRdUu
> /tmp/stackage-build2456/regex-applicative-0.3.3$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/regex-applicative-0.3.3$ ./Setup register
Registering library for regex-applicative-0.3.3..