The build is unreachable.

Build log

> /tmp/stackage-build2451$ stack unpack shelly-1.8.1@sha256:e043ee55fb6d1cd060c28bd0b2a127b8284770ba622b5b9c397ef27340052e33
Unpacked shelly-1.8.1 to /tmp/stackage-build2451/shelly-1.8.1/
> /tmp/stackage-build2451/shelly-1.8.1$ 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-build2451/shelly-1.8.1$ ./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/shelly-1.8.1 --htmldir=/home/circleci/project/builds/nightly/doc/shelly-1.8.1 --haddockdir=/home/circleci/project/builds/nightly/doc/shelly-1.8.1
Configuring shelly-1.8.1...
> /tmp/stackage-build2451/shelly-1.8.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/shelly-1.8.1$ ./Setup build
Preprocessing library for shelly-1.8.1..
Building library for shelly-1.8.1..
[1 of 7] Compiling Shelly.Base      ( src/Shelly/Base.hs, dist/build/Shelly/Base.o )

src/Shelly/Base.hs:41:1: warning: [-Wunused-imports]
    The import of ‘ProcessHandle’
    from module ‘System.Process’ is redundant
   |
41 | import System.Process( ProcessHandle, StdStream(..) )
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/Shelly/Base.hs:44:1: warning: [-Wunused-imports]
    The import of ‘liftM’ from module ‘Control.Monad’ is redundant
   |
44 | import Control.Monad (when, (>=>),
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...
[2 of 7] Compiling Shelly.Directory ( src/Shelly/Directory.hs, dist/build/Shelly/Directory.o )

src/Shelly/Directory.hs:5:1: warning: [-Wunused-imports]
    The qualified import of ‘Filesystem.Path.CurrentOS’ is redundant
      except perhaps to import instances from ‘Filesystem.Path.CurrentOS’
    To import instances alone, use: import Filesystem.Path.CurrentOS()
  |
5 | import qualified Filesystem.Path.CurrentOS as FP
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[3 of 7] Compiling Shelly.Find      ( src/Shelly/Find.hs, dist/build/Shelly/Find.o )

src/Shelly/Find.hs:67:5: warning: [-Wname-shadowing]
    This binding for ‘traverse’ shadows the existing binding
      imported from ‘Prelude’ at src/Shelly/Find.hs:11:1-32
      (and originally defined in ‘Data.Traversable’)
   |
67 |     traverse acc (relativePath, absolutePath) = do
   |     ^^^^^^^^
[4 of 7] Compiling Shelly           ( src/Shelly.hs, dist/build/Shelly.o )

src/Shelly.hs:107:1: warning: [-Wunused-imports]
    The import of ‘toLower’ from module ‘Data.Char’ is redundant
    |
107 | import Data.Char ( isAlphaNum, isSpace, toLower )
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/Shelly.hs:132:1: warning: [-Wunused-imports]
    The import of ‘Monoid’ from module ‘Data.Monoid’ is redundant
    |
132 | import Data.Monoid (Monoid, mempty, mappend)
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/Shelly.hs:388:5: warning: [-Wincomplete-patterns]
    Pattern match(es) are non-exhaustive
    In an equation for ‘toHandle’:
        Patterns not matched: (Just NoStream)
    |
388 |     toHandle (Just (UseHandle h)) = Just h
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...

src/Shelly.hs:800:1: warning: [-Wunused-top-binds]
    Defined but not used: ‘normalizeEnvVarNameString’
    |
800 | normalizeEnvVarNameString = id
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[5 of 7] Compiling Shelly.Lifted    ( src/Shelly/Lifted.hs, dist/build/Shelly/Lifted.o )

src/Shelly/Lifted.hs:105:1: warning: [-Wunused-imports]
    The import of ‘Data.Monoid’ is redundant
      except perhaps to import instances from ‘Data.Monoid’
    To import instances alone, use: import Data.Monoid()
    |
105 | import Data.Monoid
    | ^^^^^^^^^^^^^^^^^^

src/Shelly/Lifted.hs:115:1: warning: [-Wdeprecations]
    Module ‘Control.Monad.Trans.List’ is deprecated:
      This transformer is invalid on most monads
    |
115 | import Control.Monad.Trans.List
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/Shelly/Lifted.hs:118:1: warning: [-Wdeprecations]
    Module ‘Control.Monad.Trans.Error’ is deprecated:
      Use Control.Monad.Trans.Except instead
    |
118 | import Control.Monad.Trans.Error
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/Shelly/Lifted.hs:135:32: warning: [-Wdeprecations]
    In the use of type constructor or class ‘ListT’
    (imported from Control.Monad.Trans.List):
    Deprecated: "This transformer is invalid on most monads"
    |
135 | instance MonadSh m => MonadSh (ListT m) where
    |                                ^^^^^

src/Shelly/Lifted.hs:136:16: warning: [-Wdeprecations]
    In the use of data constructor ‘ListT’
    (imported from Control.Monad.Trans.List):
    Deprecated: "This transformer is invalid on most monads"
    |
136 |     liftSh m = ListT $ do
    |                ^^^^^

src/Shelly/Lifted.hs:143:11: warning: [-Wdeprecations]
    In the use of type constructor or class ‘Error’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
143 | instance (Error e, MonadSh m) => MonadSh (ErrorT e m) where
    |           ^^^^^

src/Shelly/Lifted.hs:143:43: warning: [-Wdeprecations]
    In the use of type constructor or class ‘ErrorT’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
143 | instance (Error e, MonadSh m) => MonadSh (ErrorT e m) where
    |                                           ^^^^^^

src/Shelly/Lifted.hs:144:16: warning: [-Wdeprecations]
    In the use of data constructor ‘ErrorT’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
144 |     liftSh m = ErrorT $ do
    |                ^^^^^^

src/Shelly/Lifted.hs:195:46: warning: [-Wdeprecations]
    In the use of type constructor or class ‘ListT’
    (imported from Control.Monad.Trans.List):
    Deprecated: "This transformer is invalid on most monads"
    |
195 | instance MonadShControl m => MonadShControl (ListT m) where
    |                                              ^^^^^

src/Shelly/Lifted.hs:196:18: warning: [-Wdeprecations]
    In the use of type constructor or class ‘ListT’
    (imported from Control.Monad.Trans.List):
    Deprecated: "This transformer is invalid on most monads"
    |
196 |     newtype ShM (ListT m) a = ListTShM (ShM m [a])
    |                  ^^^^^

src/Shelly/Lifted.hs:198:9: warning: [-Wdeprecations]
    In the use of data constructor ‘ListT’
    (imported from Control.Monad.Trans.List):
    Deprecated: "This transformer is invalid on most monads"
    |
198 |         ListT $ liftM return $ liftShWith $ \runInSh -> f $ \k ->
    |         ^^^^^

src/Shelly/Lifted.hs:199:40: warning: [-Wdeprecations]
    In the use of ‘runListT’ (imported from Control.Monad.Trans.List):
    Deprecated: "This transformer is invalid on most monads"
    |
199 |             liftM ListTShM $ runInSh $ runListT k
    |                                        ^^^^^^^^

src/Shelly/Lifted.hs:200:30: warning: [-Wdeprecations]
    In the use of data constructor ‘ListT’
    (imported from Control.Monad.Trans.List):
    Deprecated: "This transformer is invalid on most monads"
    |
200 |     restoreSh (ListTShM m) = ListT . restoreSh $ m
    |                              ^^^^^

src/Shelly/Lifted.hs:243:29: warning: [-Wdeprecations]
    In the use of type constructor or class ‘Error’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
243 | instance (MonadShControl m, Error e)
    |                             ^^^^^

src/Shelly/Lifted.hs:244:29: warning: [-Wdeprecations]
    In the use of type constructor or class ‘ErrorT’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
244 |          => MonadShControl (ErrorT e m) where
    |                             ^^^^^^

src/Shelly/Lifted.hs:245:18: warning: [-Wdeprecations]
    In the use of type constructor or class ‘ErrorT’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
245 |     newtype ShM (ErrorT e m) a = ErrorTShM (ShM m (Either e a))
    |                  ^^^^^^

src/Shelly/Lifted.hs:247:9: warning: [-Wdeprecations]
    In the use of data constructor ‘ErrorT’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
247 |         ErrorT $ liftM return $ liftShWith $ \runInSh -> f $ \k ->
    |         ^^^^^^

src/Shelly/Lifted.hs:248:41: warning: [-Wdeprecations]
    In the use of ‘runErrorT’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
248 |             liftM ErrorTShM $ runInSh $ runErrorT k
    |                                         ^^^^^^^^^

src/Shelly/Lifted.hs:249:31: warning: [-Wdeprecations]
    In the use of data constructor ‘ErrorT’
    (imported from Control.Monad.Trans.Error):
    Deprecated: "Use Control.Monad.Trans.Except instead"
    |
249 |     restoreSh (ErrorTShM m) = ErrorT . restoreSh $ m
    |                               ^^^^^^
[6 of 7] Compiling Shelly.Pipe      ( src/Shelly/Pipe.hs, dist/build/Shelly/Pipe.o )
[7 of 7] Compiling Shelly.Unix      ( src/Shelly/Unix.hs, dist/build/Shelly/Unix.o )
> /tmp/stackage-build2451/shelly-1.8.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/shelly-1.8.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181119/shelly-1.8.1-5r4FL1ur1iEAjxz0hgSliz
> /tmp/stackage-build2451/shelly-1.8.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2451/shelly-1.8.1$ ./Setup register
Registering library for shelly-1.8.1..