The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack fast-logger-2.4.11@sha256:721425a48fe0043ca5da025bcd0c3bce02a9be09547c689e2818ceec81513a06
Unpacked fast-logger-2.4.11 to /tmp/stackage-build2452/fast-logger-2.4.11/
> /tmp/stackage-build2452/fast-logger-2.4.11$ 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/fast-logger-2.4.11$ ./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/fast-logger-2.4.11 --htmldir=/home/circleci/project/builds/nightly/doc/fast-logger-2.4.11 --haddockdir=/home/circleci/project/builds/nightly/doc/fast-logger-2.4.11
Configuring fast-logger-2.4.11...
> /tmp/stackage-build2452/fast-logger-2.4.11$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/fast-logger-2.4.11$ ./Setup build
Preprocessing library for fast-logger-2.4.11..
Building library for fast-logger-2.4.11..
[1 of 8] Compiling System.Log.FastLogger.Date ( System/Log/FastLogger/Date.hs, dist/build/System/Log/FastLogger/Date.o )
[2 of 8] Compiling System.Log.FastLogger.File ( System/Log/FastLogger/File.hs, dist/build/System/Log/FastLogger/File.o )
[3 of 8] Compiling System.Log.FastLogger.FileIO ( System/Log/FastLogger/FileIO.hs, dist/build/System/Log/FastLogger/FileIO.o )
[4 of 8] Compiling System.Log.FastLogger.IORef ( System/Log/FastLogger/IORef.hs, dist/build/System/Log/FastLogger/IORef.o )
[5 of 8] Compiling System.Log.FastLogger.LogStr ( System/Log/FastLogger/LogStr.hs, dist/build/System/Log/FastLogger/LogStr.o )
[6 of 8] Compiling System.Log.FastLogger.IO ( System/Log/FastLogger/IO.hs, dist/build/System/Log/FastLogger/IO.o )
[7 of 8] Compiling System.Log.FastLogger.Logger ( System/Log/FastLogger/Logger.hs, dist/build/System/Log/FastLogger/Logger.o )
[8 of 8] Compiling System.Log.FastLogger ( System/Log/FastLogger.hs, dist/build/System/Log/FastLogger.o )
> /tmp/stackage-build2452/fast-logger-2.4.11$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/fast-logger-2.4.11$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/fast-logger-2.4.11-5c8bW86ncUn9ByQ0a9DngS
> /tmp/stackage-build2452/fast-logger-2.4.11$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/fast-logger-2.4.11$ ./Setup register
Registering library for fast-logger-2.4.11..