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> /tmp/stackage-build2452$ stack unpack union-find-0.2@sha256:22e97cd9aeb8c96bf7cd8d359d4eda635dc0e0a6cd91b9a07e5a203b00949c8d
Unpacked union-find-0.2 to /tmp/stackage-build2452/union-find-0.2/
> /tmp/stackage-build2452/union-find-0.2$ 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/union-find-0.2$ ./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/union-find-0.2 --htmldir=/home/circleci/project/builds/nightly/doc/union-find-0.2 --haddockdir=/home/circleci/project/builds/nightly/doc/union-find-0.2
Configuring union-find-0.2...
> /tmp/stackage-build2452/union-find-0.2$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/union-find-0.2$ ./Setup build
Preprocessing library for union-find-0.2..
Building library for union-find-0.2..
[1 of 4] Compiling Data.UnionFind.IO ( src/Data/UnionFind/IO.hs, dist/build/Data/UnionFind/IO.o )

src/Data/UnionFind/IO.hs:36:1: warning: [-Wunused-imports]
    The import of ‘Control.Applicative’ is redundant
      except perhaps to import instances from ‘Control.Applicative’
    To import instances alone, use: import Control.Applicative()
   |
36 | import Control.Applicative
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[2 of 4] Compiling Data.UnionFind.IntMap ( src/Data/UnionFind/IntMap.hs, dist/build/Data/UnionFind/IntMap.o )
[3 of 4] Compiling Control.Monad.Trans.UnionFind ( src/Control/Monad/Trans/UnionFind.hs, dist/build/Control/Monad/Trans/UnionFind.o )
[4 of 4] Compiling Data.UnionFind.ST ( src/Data/UnionFind/ST.hs, dist/build/Data/UnionFind/ST.o )

src/Data/UnionFind/ST.hs:34:1: warning: [-Wunused-imports]
    The import of ‘Control.Applicative’ is redundant
      except perhaps to import instances from ‘Control.Applicative’
    To import instances alone, use: import Control.Applicative()
   |
34 | import Control.Applicative
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
> /tmp/stackage-build2452/union-find-0.2$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/union-find-0.2$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181119/union-find-0.2-Bp8n8KFLcGYAHIJidA7kxS
> /tmp/stackage-build2452/union-find-0.2$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/union-find-0.2$ ./Setup register
Registering library for union-find-0.2..