The build is unreachable.

Build log

> /tmp/stackage-build2454$ stack unpack extra-1.6.13@sha256:0f11fb8646a4f38ad7fb917d52b8d2557c572f8b3d5002b12795d561a944a09e
Unpacked extra-1.6.13 to /tmp/stackage-build2454/extra-1.6.13/
> /tmp/stackage-build2454/extra-1.6.13$ 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/extra-1.6.13$ ./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/extra-1.6.13 --htmldir=/home/circleci/project/builds/nightly/doc/extra-1.6.13 --haddockdir=/home/circleci/project/builds/nightly/doc/extra-1.6.13
Configuring extra-1.6.13...
> /tmp/stackage-build2454/extra-1.6.13$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/extra-1.6.13$ ./Setup build
Preprocessing library for extra-1.6.13..
Building library for extra-1.6.13..
[ 1 of 19] Compiling Data.IORef.Extra ( src/Data/IORef/Extra.hs, dist/build/Data/IORef/Extra.o )
[ 2 of 19] Compiling Data.Tuple.Extra ( src/Data/Tuple/Extra.hs, dist/build/Data/Tuple/Extra.o )
[ 3 of 19] Compiling Data.Typeable.Extra ( src/Data/Typeable/Extra.hs, dist/build/Data/Typeable/Extra.o )
[ 4 of 19] Compiling Numeric.Extra    ( src/Numeric/Extra.hs, dist/build/Numeric/Extra.o )
[ 5 of 19] Compiling Partial          ( src/Partial.hs, dist/build/Partial.o )
[ 6 of 19] Compiling Data.List.Extra  ( src/Data/List/Extra.hs, dist/build/Data/List/Extra.o )
[ 7 of 19] Compiling Data.Version.Extra ( src/Data/Version/Extra.hs, dist/build/Data/Version/Extra.o )
[ 8 of 19] Compiling Data.Either.Extra ( src/Data/Either/Extra.hs, dist/build/Data/Either/Extra.o )
[ 9 of 19] Compiling Control.Exception.Extra ( src/Control/Exception/Extra.hs, dist/build/Control/Exception/Extra.o )
[10 of 19] Compiling Control.Monad.Extra ( src/Control/Monad/Extra.hs, dist/build/Control/Monad/Extra.o )
[11 of 19] Compiling Control.Concurrent.Extra ( src/Control/Concurrent/Extra.hs, dist/build/Control/Concurrent/Extra.o )
[12 of 19] Compiling System.Directory.Extra ( src/System/Directory/Extra.hs, dist/build/System/Directory/Extra.o )
[13 of 19] Compiling System.Environment.Extra ( src/System/Environment/Extra.hs, dist/build/System/Environment/Extra.o )
[14 of 19] Compiling System.IO.Extra  ( src/System/IO/Extra.hs, dist/build/System/IO/Extra.o )
[15 of 19] Compiling System.Info.Extra ( src/System/Info/Extra.hs, dist/build/System/Info/Extra.o )
[16 of 19] Compiling System.Process.Extra ( src/System/Process/Extra.hs, dist/build/System/Process/Extra.o )
[17 of 19] Compiling System.Time.Extra ( src/System/Time/Extra.hs, dist/build/System/Time/Extra.o )
[18 of 19] Compiling Text.Read.Extra  ( src/Text/Read/Extra.hs, dist/build/Text/Read/Extra.o )
[19 of 19] Compiling Extra            ( src/Extra.hs, dist/build/Extra.o )
> /tmp/stackage-build2454/extra-1.6.13$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/extra-1.6.13$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/extra-1.6.13-I7yRoXSAMXd39a4Szewpph
> /tmp/stackage-build2454/extra-1.6.13$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2454/extra-1.6.13$ ./Setup register
Registering library for extra-1.6.13..