The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack blaze-builder-0.4.1.0@sha256:fa992674ea28f6ea6569d93388d757aef928af1e2f0ce80a35c29fb782252a2d
Unpacked blaze-builder-0.4.1.0 to /tmp/stackage-build2456/blaze-builder-0.4.1.0/
> /tmp/stackage-build2456/blaze-builder-0.4.1.0$ 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-build2456/blaze-builder-0.4.1.0$ ./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/blaze-builder-0.4.1.0 --htmldir=/home/circleci/project/builds/nightly/doc/blaze-builder-0.4.1.0 --haddockdir=/home/circleci/project/builds/nightly/doc/blaze-builder-0.4.1.0
Configuring blaze-builder-0.4.1.0...
> /tmp/stackage-build2456/blaze-builder-0.4.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/blaze-builder-0.4.1.0$ ./Setup build
Preprocessing library for blaze-builder-0.4.1.0..
Building library for blaze-builder-0.4.1.0..
[ 1 of 11] Compiling Blaze.ByteString.Builder.Internal.Write ( Blaze/ByteString/Builder/Internal/Write.hs, dist/build/Blaze/ByteString/Builder/Internal/Write.o )
[ 2 of 11] Compiling Blaze.ByteString.Builder.Compat.Write ( Blaze/ByteString/Builder/Compat/Write.hs, dist/build/Blaze/ByteString/Builder/Compat/Write.o )
[ 3 of 11] Compiling Blaze.ByteString.Builder.Int ( Blaze/ByteString/Builder/Int.hs, dist/build/Blaze/ByteString/Builder/Int.o )
[ 4 of 11] Compiling Blaze.ByteString.Builder.Html.Word ( Blaze/ByteString/Builder/Html/Word.hs, dist/build/Blaze/ByteString/Builder/Html/Word.o )
[ 5 of 11] Compiling Blaze.ByteString.Builder.Char8 ( Blaze/ByteString/Builder/Char8.hs, dist/build/Blaze/ByteString/Builder/Char8.o )
[ 6 of 11] Compiling Blaze.ByteString.Builder.Char.Utf8 ( Blaze/ByteString/Builder/Char/Utf8.hs, dist/build/Blaze/ByteString/Builder/Char/Utf8.o )
[ 7 of 11] Compiling Blaze.ByteString.Builder.Html.Utf8 ( Blaze/ByteString/Builder/Html/Utf8.hs, dist/build/Blaze/ByteString/Builder/Html/Utf8.o )
[ 8 of 11] Compiling Blaze.ByteString.Builder.ByteString ( Blaze/ByteString/Builder/ByteString.hs, dist/build/Blaze/ByteString/Builder/ByteString.o )
[ 9 of 11] Compiling Blaze.ByteString.Builder.HTTP ( Blaze/ByteString/Builder/HTTP.hs, dist/build/Blaze/ByteString/Builder/HTTP.o )
[10 of 11] Compiling Blaze.ByteString.Builder.Word ( Blaze/ByteString/Builder/Word.hs, dist/build/Blaze/ByteString/Builder/Word.o )
[11 of 11] Compiling Blaze.ByteString.Builder ( Blaze/ByteString/Builder.hs, dist/build/Blaze/ByteString/Builder.o )
> /tmp/stackage-build2456/blaze-builder-0.4.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/blaze-builder-0.4.1.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/blaze-builder-0.4.1.0-IvKTJSVksPjLgvciAbWujM
> /tmp/stackage-build2456/blaze-builder-0.4.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/blaze-builder-0.4.1.0$ ./Setup register
Registering library for blaze-builder-0.4.1.0..