The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack fsnotify-0.3.0.1@sha256:58bb530d7acf93eb4ed69473e32a1485581815f04f69dfc8a278523781ba49dd
Unpacked fsnotify-0.3.0.1 to /tmp/stackage-build2452/fsnotify-0.3.0.1/
> /tmp/stackage-build2452/fsnotify-0.3.0.1$ 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-build2452/fsnotify-0.3.0.1$ ./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/fsnotify-0.3.0.1 --htmldir=/home/circleci/project/builds/nightly/doc/fsnotify-0.3.0.1 --haddockdir=/home/circleci/project/builds/nightly/doc/fsnotify-0.3.0.1
Configuring fsnotify-0.3.0.1...
> /tmp/stackage-build2452/fsnotify-0.3.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/fsnotify-0.3.0.1$ ./Setup build
Preprocessing library for fsnotify-0.3.0.1..
Building library for fsnotify-0.3.0.1..
[1 of 7] Compiling System.FSNotify.Path ( src/System/FSNotify/Path.hs, dist/build/System/FSNotify/Path.o )
[2 of 7] Compiling System.FSNotify.Types ( src/System/FSNotify/Types.hs, dist/build/System/FSNotify/Types.o )
[3 of 7] Compiling System.FSNotify.Listener ( src/System/FSNotify/Listener.hs, dist/build/System/FSNotify/Listener.o )
[4 of 7] Compiling System.FSNotify.Polling ( src/System/FSNotify/Polling.hs, dist/build/System/FSNotify/Polling.o )

src/System/FSNotify/Polling.hs:64:17: warning: [-Wname-shadowing]
    This binding for ‘path’ shadows the existing binding
      bound at src/System/FSNotify/Polling.hs:58:22
   |
64 |     pathAndInfo path = handle (\(_ :: IOException) -> return Nothing) $ do
   |                 ^^^^
[5 of 7] Compiling System.FSNotify.Linux ( src/System/FSNotify/Linux.hs, dist/build/System/FSNotify/Linux.o )
[6 of 7] Compiling System.FSNotify  ( src/System/FSNotify.hs, dist/build/System/FSNotify.o )
[7 of 7] Compiling System.FSNotify.Devel ( src/System/FSNotify/Devel.hs, dist/build/System/FSNotify/Devel.o )
> /tmp/stackage-build2452/fsnotify-0.3.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/fsnotify-0.3.0.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181113/fsnotify-0.3.0.1-CqcGs1xjz6yIKdybIucklF
> /tmp/stackage-build2452/fsnotify-0.3.0.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/fsnotify-0.3.0.1$ ./Setup register
Registering library for fsnotify-0.3.0.1..