The build is unreachable.

Build log

> /tmp/stackage-build2452$ stack unpack clay-0.13.1@sha256:23dfd7d8179f91f8de54fa79c3a0e8e150d2dbd136b2e58dcb42bf52d5232e00
Unpacked clay-0.13.1 to /tmp/stackage-build2452/clay-0.13.1/
> /tmp/stackage-build2452/clay-0.13.1$ 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-build2452/clay-0.13.1$ ./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/clay-0.13.1 --htmldir=/home/circleci/project/builds/nightly/doc/clay-0.13.1 --haddockdir=/home/circleci/project/builds/nightly/doc/clay-0.13.1
Configuring clay-0.13.1...
> /tmp/stackage-build2452/clay-0.13.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/clay-0.13.1$ ./Setup build
Preprocessing library for clay-0.13.1..
Building library for clay-0.13.1..
[ 1 of 31] Compiling Clay.Property    ( src/Clay/Property.hs, dist/build/Clay/Property.o )

src/Clay/Property.hs:9:1: warning: [-Wunused-imports]
    The import of ‘Data.Semigroup’ is redundant
      except perhaps to import instances from ‘Data.Semigroup’
    To import instances alone, use: import Data.Semigroup()
  |
9 | import Data.Semigroup
  | ^^^^^^^^^^^^^^^^^^^^^
[ 2 of 31] Compiling Clay.Common      ( src/Clay/Common.hs, dist/build/Clay/Common.o )
[ 3 of 31] Compiling Clay.Color       ( src/Clay/Color.hs, dist/build/Clay/Color.o )

src/Clay/Color.hs:5:1: 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()
  |
5 | import Data.Monoid
  | ^^^^^^^^^^^^^^^^^^
[ 4 of 31] Compiling Clay.Selector    ( src/Clay/Selector.hs, dist/build/Clay/Selector.o )

src/Clay/Selector.hs:13:1: 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()
   |
13 | import Control.Applicative
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^

src/Clay/Selector.hs:14:1: warning: [-Wunused-imports]
    The import of ‘Data.Semigroup’ is redundant
      except perhaps to import instances from ‘Data.Semigroup’
    To import instances alone, use: import Data.Semigroup()
   |
14 | import Data.Semigroup
   | ^^^^^^^^^^^^^^^^^^^^^
[ 5 of 31] Compiling Clay.Elements    ( src/Clay/Elements.hs, dist/build/Clay/Elements.o )
[ 6 of 31] Compiling Clay.Attributes  ( src/Clay/Attributes.hs, dist/build/Clay/Attributes.o )
[ 7 of 31] Compiling Clay.Stylesheet  ( src/Clay/Stylesheet.hs, dist/build/Clay/Stylesheet.o )
[ 8 of 31] Compiling Clay.Size        ( src/Clay/Size.hs, dist/build/Clay/Size.o )
[ 9 of 31] Compiling Clay.Render      ( src/Clay/Render.hs, dist/build/Clay/Render.o )
[10 of 31] Compiling Clay.Pseudo      ( src/Clay/Pseudo.hs, dist/build/Clay/Pseudo.o )
[11 of 31] Compiling Clay.Media       ( src/Clay/Media.hs, dist/build/Clay/Media.o )
[12 of 31] Compiling Clay.List        ( src/Clay/List.hs, dist/build/Clay/List.o )

src/Clay/List.hs:39:1: warning: [-Wunused-imports]
    The import of ‘Data.Semigroup’ is redundant
      except perhaps to import instances from ‘Data.Semigroup’
    To import instances alone, use: import Data.Semigroup()
   |
39 | import Data.Semigroup
   | ^^^^^^^^^^^^^^^^^^^^^
[13 of 31] Compiling Clay.Geometry    ( src/Clay/Geometry.hs, dist/build/Clay/Geometry.o )
[14 of 31] Compiling Clay.FontFace    ( src/Clay/FontFace.hs, dist/build/Clay/FontFace.o )
[15 of 31] Compiling Clay.Font        ( src/Clay/Font.hs, dist/build/Clay/Font.o )
[16 of 31] Compiling Clay.Flexbox     ( src/Clay/Flexbox.hs, dist/build/Clay/Flexbox.o )
[17 of 31] Compiling Clay.Filter      ( src/Clay/Filter.hs, dist/build/Clay/Filter.o )
[18 of 31] Compiling Clay.Dynamic     ( src/Clay/Dynamic.hs, dist/build/Clay/Dynamic.o )
[19 of 31] Compiling Clay.Display     ( src/Clay/Display.hs, dist/build/Clay/Display.o )

src/Clay/Display.hs:78:1: 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()
   |
78 | import Data.Monoid
   | ^^^^^^^^^^^^^^^^^^
[20 of 31] Compiling Clay.Comments    ( src/Clay/Comments.hs, dist/build/Clay/Comments.o )
[21 of 31] Compiling Clay.Border      ( src/Clay/Border.hs, dist/build/Clay/Border.o )
[22 of 31] Compiling Clay.Box         ( src/Clay/Box.hs, dist/build/Clay/Box.o )

src/Clay/Box.hs:23:1: 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()
   |
23 | import Data.Monoid
   | ^^^^^^^^^^^^^^^^^^
[23 of 31] Compiling Clay.Background  ( src/Clay/Background.hs, dist/build/Clay/Background.o )
[24 of 31] Compiling Clay.Mask        ( src/Clay/Mask.hs, dist/build/Clay/Mask.o )

src/Clay/Mask.hs:60:1: warning: [-Wunused-imports]
    The import of ‘Data.Semigroup’ is redundant
      except perhaps to import instances from ‘Data.Semigroup’
    To import instances alone, use: import Data.Semigroup()
   |
60 | import Data.Semigroup
   | ^^^^^^^^^^^^^^^^^^^^^
[25 of 31] Compiling Clay.Gradient    ( src/Clay/Gradient.hs, dist/build/Clay/Gradient.o )

src/Clay/Gradient.hs:39:1: 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()
   |
39 | import Data.Monoid
   | ^^^^^^^^^^^^^^^^^^
[26 of 31] Compiling Clay.Text        ( src/Clay/Text.hs, dist/build/Clay/Text.o )

src/Clay/Text.hs:97:1: 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()
   |
97 | import Data.Monoid
   | ^^^^^^^^^^^^^^^^^^
[27 of 31] Compiling Clay.Time        ( src/Clay/Time.hs, dist/build/Clay/Time.o )

src/Clay/Time.hs:15:1: 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()
   |
15 | import Data.Monoid
   | ^^^^^^^^^^^^^^^^^^
[28 of 31] Compiling Clay.Transform   ( src/Clay/Transform.hs, dist/build/Clay/Transform.o )
[29 of 31] Compiling Clay.Transition  ( src/Clay/Transition.hs, dist/build/Clay/Transition.o )

src/Clay/Transition.hs:39:1: 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()
   |
39 | import Data.Monoid
   | ^^^^^^^^^^^^^^^^^^

src/Clay/Transition.hs:86:1: warning: [-Wmissing-signatures]
    Top-level binding with no type signature: stepEnd :: TimingFunction
   |
86 | stepEnd    = other "step-end"
   | ^^^^^^^
[30 of 31] Compiling Clay.Animation   ( src/Clay/Animation.hs, dist/build/Clay/Animation.o )
[31 of 31] Compiling Clay             ( src/Clay.hs, dist/build/Clay.o )
> /tmp/stackage-build2452/clay-0.13.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/clay-0.13.1$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181122/clay-0.13.1-9VFuPHDUy71DymMWKTeyL9
> /tmp/stackage-build2452/clay-0.13.1$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2452/clay-0.13.1$ ./Setup register
Registering library for clay-0.13.1..