The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack hw-fingertree-strict-0.1.1.1@sha256:5d72b48bf6e2413813c55c52e070aaa8ac9a6e6c1bdd12cba36f12e0ccc4eb86
Unpacked hw-fingertree-strict-0.1.1.1 to /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1/
> /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1$ 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/hw-fingertree-strict-0.1.1.1$ ./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/hw-fingertree-strict-0.1.1.1 --htmldir=/home/circleci/project/builds/nightly/doc/hw-fingertree-strict-0.1.1.1 --haddockdir=/home/circleci/project/builds/nightly/doc/hw-fingertree-strict-0.1.1.1
Configuring hw-fingertree-strict-0.1.1.1...
> /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1$ ./Setup build
Preprocessing library for hw-fingertree-strict-0.1.1.1..
Building library for hw-fingertree-strict-0.1.1.1..

src/HaskellWorks/Data/FingerTree/Strict.hs:12:14: warning:
    -XAutoDeriveTypeable is deprecated: Typeable instances are created automatically for all types since GHC 8.2.
   |
12 | {-# LANGUAGE AutoDeriveTypeable     #-}
   |              ^^^^^^^^^^^^^^^^^^

src/HaskellWorks/Data/IntervalMap/Strict.hs:9:14: warning:
    -XAutoDeriveTypeable is deprecated: Typeable instances are created automatically for all types since GHC 8.2.
  |
9 | {-# LANGUAGE AutoDeriveTypeable    #-}
  |              ^^^^^^^^^^^^^^^^^^

src/HaskellWorks/Data/PriorityQueue/Strict.hs:7:14: warning:
    -XAutoDeriveTypeable is deprecated: Typeable instances are created automatically for all types since GHC 8.2.
  |
7 | {-# LANGUAGE AutoDeriveTypeable    #-}
  |              ^^^^^^^^^^^^^^^^^^

src/HaskellWorks/Data/SegmentMap/Strict.hs:12:14: warning:
    -XAutoDeriveTypeable is deprecated: Typeable instances are created automatically for all types since GHC 8.2.
   |
12 | {-# LANGUAGE AutoDeriveTypeable    #-}
   |              ^^^^^^^^^^^^^^^^^^

src/HaskellWorks/Data/SegmentSet/Strict.hs:11:14: warning:
    -XAutoDeriveTypeable is deprecated: Typeable instances are created automatically for all types since GHC 8.2.
   |
11 | {-# LANGUAGE AutoDeriveTypeable    #-}
   |              ^^^^^^^^^^^^^^^^^^
[1 of 8] Compiling HaskellWorks.Data.FingerTree.Strict ( src/HaskellWorks/Data/FingerTree/Strict.hs, dist/build/HaskellWorks/Data/FingerTree/Strict.o )
[2 of 8] Compiling HaskellWorks.Data.IntervalMap.Strict ( src/HaskellWorks/Data/IntervalMap/Strict.hs, dist/build/HaskellWorks/Data/IntervalMap/Strict.o )
[3 of 8] Compiling HaskellWorks.Data.Item.Strict ( src/HaskellWorks/Data/Item/Strict.hs, dist/build/HaskellWorks/Data/Item/Strict.o )
[4 of 8] Compiling HaskellWorks.Data.PriorityQueue.Strict ( src/HaskellWorks/Data/PriorityQueue/Strict.hs, dist/build/HaskellWorks/Data/PriorityQueue/Strict.o )
[5 of 8] Compiling HaskellWorks.Data.Segment.Strict ( src/HaskellWorks/Data/Segment/Strict.hs, dist/build/HaskellWorks/Data/Segment/Strict.o )
[6 of 8] Compiling HaskellWorks.Data.SegmentMap.Strict ( src/HaskellWorks/Data/SegmentMap/Strict.hs, dist/build/HaskellWorks/Data/SegmentMap/Strict.o )
[7 of 8] Compiling HaskellWorks.Data.SegmentSet.Strict ( src/HaskellWorks/Data/SegmentSet/Strict.hs, dist/build/HaskellWorks/Data/SegmentSet/Strict.o )
[8 of 8] Compiling Paths_hw_fingertree_strict ( dist/build/autogen/Paths_hw_fingertree_strict.hs, dist/build/Paths_hw_fingertree_strict.o )
> /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/hw-fingertree-strict-0.1.1.1-GWhBts2yEjhSb4VnjG7Bc
> /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/hw-fingertree-strict-0.1.1.1$ ./Setup register
Registering library for hw-fingertree-strict-0.1.1.1..