The build is unreachable.
Build log
> /tmp/stackage-build2452$ stack unpack string-transform-1.1.0@sha256:b0717fffba9b20db722be7bc40e7149d29c41ebbe1685362a51c37d8fd9db13b
Unpacked string-transform-1.1.0 to /tmp/stackage-build2452/string-transform-1.1.0/
> /tmp/stackage-build2452/string-transform-1.1.0$ 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-build2452/string-transform-1.1.0$ ./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/string-transform-1.1.0 --htmldir=/home/circleci/project/builds/nightly/doc/string-transform-1.1.0 --haddockdir=/home/circleci/project/builds/nightly/doc/string-transform-1.1.0
Configuring string-transform-1.1.0...
> /tmp/stackage-build2452/string-transform-1.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/string-transform-1.1.0$ ./Setup build
Preprocessing library for string-transform-1.1.0..
Building library for string-transform-1.1.0..
[1 of 2] Compiling Data.String.Transform ( src/Data/String/Transform.hs, dist/build/Data/String/Transform.o )
[2 of 2] Compiling Paths_string_transform ( dist/build/autogen/Paths_string_transform.hs, dist/build/Paths_string_transform.o )
> /tmp/stackage-build2452/string-transform-1.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/string-transform-1.1.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181113/string-transform-1.1.0-6V1sNjlTH69De3dHS8pusH
> /tmp/stackage-build2452/string-transform-1.1.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/string-transform-1.1.0$ ./Setup register
Registering library for string-transform-1.1.0..