The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack psqueues-0.2.7.0@sha256:189970837d0aae01f48cd2a8aac6ce314191939e118cc0488aee1fb12da1956a
Unpacked psqueues-0.2.7.0 to /tmp/stackage-build2452/psqueues-0.2.7.0/
> /tmp/stackage-build2452/psqueues-0.2.7.0$ 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-build2452/psqueues-0.2.7.0$ ./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/psqueues-0.2.7.0 --htmldir=/home/circleci/project/builds/nightly/doc/psqueues-0.2.7.0 --haddockdir=/home/circleci/project/builds/nightly/doc/psqueues-0.2.7.0
Configuring psqueues-0.2.7.0...
> /tmp/stackage-build2452/psqueues-0.2.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/psqueues-0.2.7.0$ ./Setup build
Preprocessing library for psqueues-0.2.7.0..
Building library for psqueues-0.2.7.0..
[1 of 7] Compiling Data.BitUtil     ( src/Data/BitUtil.hs, dist/build/Data/BitUtil.o )
[2 of 7] Compiling Data.IntPSQ.Internal ( src/Data/IntPSQ/Internal.hs, dist/build/Data/IntPSQ/Internal.o )
[3 of 7] Compiling Data.IntPSQ      ( src/Data/IntPSQ.hs, dist/build/Data/IntPSQ.o )
[4 of 7] Compiling Data.OrdPSQ.Internal ( src/Data/OrdPSQ/Internal.hs, dist/build/Data/OrdPSQ/Internal.o )
[5 of 7] Compiling Data.OrdPSQ      ( src/Data/OrdPSQ.hs, dist/build/Data/OrdPSQ.o )
[6 of 7] Compiling Data.HashPSQ.Internal ( src/Data/HashPSQ/Internal.hs, dist/build/Data/HashPSQ/Internal.o )
[7 of 7] Compiling Data.HashPSQ     ( src/Data/HashPSQ.hs, dist/build/Data/HashPSQ.o )
> /tmp/stackage-build2452/psqueues-0.2.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/psqueues-0.2.7.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/psqueues-0.2.7.0-KcTUHFjNouTCiUmM2KjzkS
> /tmp/stackage-build2452/psqueues-0.2.7.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/psqueues-0.2.7.0$ ./Setup register
Registering library for psqueues-0.2.7.0..