The build is unreachable.

Build log

> /tmp/stackage-build2453$ stack unpack zeromq4-haskell-0.7.0@sha256:a4dc3775242ba4a634b0f23fb07d54506928fc9b1981b604eef60bc23f03b31b
Unpacked zeromq4-haskell-0.7.0 to /tmp/stackage-build2453/zeromq4-haskell-0.7.0/
> /tmp/stackage-build2453/zeromq4-haskell-0.7.0$ 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-build2453/zeromq4-haskell-0.7.0$ ./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/zeromq4-haskell-0.7.0 --htmldir=/home/circleci/project/builds/nightly/doc/zeromq4-haskell-0.7.0 --haddockdir=/home/circleci/project/builds/nightly/doc/zeromq4-haskell-0.7.0
Configuring zeromq4-haskell-0.7.0...
> /tmp/stackage-build2453/zeromq4-haskell-0.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/zeromq4-haskell-0.7.0$ ./Setup build
Preprocessing library for zeromq4-haskell-0.7.0..
Building library for zeromq4-haskell-0.7.0..
[1 of 6] Compiling Data.Restricted  ( src/Data/Restricted.hs, dist/build/Data/Restricted.o )
[2 of 6] Compiling System.ZMQ4.Internal.Base ( dist/build/System/ZMQ4/Internal/Base.hs, dist/build/System/ZMQ4/Internal/Base.o )
[3 of 6] Compiling System.ZMQ4.Internal.Error ( src/System/ZMQ4/Internal/Error.hs, dist/build/System/ZMQ4/Internal/Error.o )
[4 of 6] Compiling System.ZMQ4.Internal ( src/System/ZMQ4/Internal.hs, dist/build/System/ZMQ4/Internal.o )
[5 of 6] Compiling System.ZMQ4      ( src/System/ZMQ4.hs, dist/build/System/ZMQ4.o )
[6 of 6] Compiling System.ZMQ4.Monadic ( src/System/ZMQ4/Monadic.hs, dist/build/System/ZMQ4/Monadic.o )

src/System/ZMQ4/Monadic.hs:250:10: warning: [-Wmissing-methods]
    • No explicit implementation for
        ‘generalBracket’
    • In the instance declaration for ‘MonadMask (ZMQ z)’
    |
250 | instance MonadMask (ZMQ z) where
    |          ^^^^^^^^^^^^^^^^^
> /tmp/stackage-build2453/zeromq4-haskell-0.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/zeromq4-haskell-0.7.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181115/zeromq4-haskell-0.7.0-DXy4X4MMVDmKKOeg8lhYrf
> /tmp/stackage-build2453/zeromq4-haskell-0.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2453/zeromq4-haskell-0.7.0$ ./Setup register
Registering library for zeromq4-haskell-0.7.0..