The build is unreachable.
Build log
> /tmp/stackage-build2454$ stack unpack ghcid-0.7.1@sha256:81482348bec7f1548e34e15683d47b7324e98e519bbb720bb786fd0c627fe86e
Unpacked ghcid-0.7.1 to /tmp/stackage-build2454/ghcid-0.7.1/
> /tmp/stackage-build2454/ghcid-0.7.1$ 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/ghcid-0.7.1$ ./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/ghcid-0.7.1 --htmldir=/home/circleci/project/builds/nightly/doc/ghcid-0.7.1 --haddockdir=/home/circleci/project/builds/nightly/doc/ghcid-0.7.1
Configuring ghcid-0.7.1...
> /tmp/stackage-build2454/ghcid-0.7.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/ghcid-0.7.1$ ./Setup build
Preprocessing executable 'ghcid' for ghcid-0.7.1..
Building executable 'ghcid' for ghcid-0.7.1..
[ 1 of 10] Compiling Language.Haskell.Ghcid.Escape ( src/Language/Haskell/Ghcid/Escape.hs, dist/build/ghcid/ghcid-tmp/Language/Haskell/Ghcid/Escape.o )
[ 2 of 10] Compiling Language.Haskell.Ghcid.Terminal ( src/Language/Haskell/Ghcid/Terminal.hs, dist/build/ghcid/ghcid-tmp/Language/Haskell/Ghcid/Terminal.o )
[ 3 of 10] Compiling Language.Haskell.Ghcid.Types ( src/Language/Haskell/Ghcid/Types.hs, dist/build/ghcid/ghcid-tmp/Language/Haskell/Ghcid/Types.o )
[ 4 of 10] Compiling Language.Haskell.Ghcid.Parser ( src/Language/Haskell/Ghcid/Parser.hs, dist/build/ghcid/ghcid-tmp/Language/Haskell/Ghcid/Parser.o )
[ 5 of 10] Compiling Language.Haskell.Ghcid.Util ( src/Language/Haskell/Ghcid/Util.hs, dist/build/ghcid/ghcid-tmp/Language/Haskell/Ghcid/Util.o )
[ 6 of 10] Compiling Language.Haskell.Ghcid ( src/Language/Haskell/Ghcid.hs, dist/build/ghcid/ghcid-tmp/Language/Haskell/Ghcid.o )
[ 7 of 10] Compiling Paths_ghcid ( dist/build/ghcid/autogen/Paths_ghcid.hs, dist/build/ghcid/ghcid-tmp/Paths_ghcid.o )
[ 8 of 10] Compiling Session ( src/Session.hs, dist/build/ghcid/ghcid-tmp/Session.o )
[ 9 of 10] Compiling Wait ( src/Wait.hs, dist/build/ghcid/ghcid-tmp/Wait.o )
[10 of 10] Compiling Ghcid ( src/Ghcid.hs, dist/build/ghcid/ghcid-tmp/Ghcid.o )
Linking dist/build/ghcid/ghcid ...
Preprocessing library for ghcid-0.7.1..
Building library for ghcid-0.7.1..
[1 of 6] Compiling Language.Haskell.Ghcid.Escape ( src/Language/Haskell/Ghcid/Escape.hs, dist/build/Language/Haskell/Ghcid/Escape.o )
[2 of 6] Compiling Language.Haskell.Ghcid.Types ( src/Language/Haskell/Ghcid/Types.hs, dist/build/Language/Haskell/Ghcid/Types.o )
[3 of 6] Compiling Language.Haskell.Ghcid.Parser ( src/Language/Haskell/Ghcid/Parser.hs, dist/build/Language/Haskell/Ghcid/Parser.o )
[4 of 6] Compiling Language.Haskell.Ghcid.Util ( src/Language/Haskell/Ghcid/Util.hs, dist/build/Language/Haskell/Ghcid/Util.o )
[5 of 6] Compiling Language.Haskell.Ghcid ( src/Language/Haskell/Ghcid.hs, dist/build/Language/Haskell/Ghcid.o )
[6 of 6] Compiling Paths_ghcid ( dist/build/autogen/Paths_ghcid.hs, dist/build/Paths_ghcid.o )
> /tmp/stackage-build2454/ghcid-0.7.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/ghcid-0.7.1$ ./Setup copy
Installing executable ghcid in /home/circleci/project/builds/nightly/bin
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/ghcid-0.7.1-28tI2UttNHC24Z4pya74qM
> /tmp/stackage-build2454/ghcid-0.7.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/ghcid-0.7.1$ ./Setup register
Registering library for ghcid-0.7.1..