Warning: The install command is a part of the legacy v1 style of cabal usage.

Please switch to using either the new project style and the new-install
command or the legacy v1-install alias as new-style projects will become the
default in the next version of cabal-install. Please file a bug if you cannot
replicate a working v1- use case with the new-style commands.

For more information, see: https://wiki.haskell.org/Cabal/NewBuild

Resolving dependencies...
Starting     lawful-0.1.0.0
Starting     primitive-0.6.4.0
Building     lawful-0.1.0.0
Building     primitive-0.6.4.0
Completed    lawful-0.1.0.0
Starting     gdp-0.0.0.2
Building     gdp-0.0.0.2
Completed    gdp-0.0.0.2
Completed    primitive-0.6.4.0
Downloading  st2-0.1.0.1
Downloaded   st2-0.1.0.1
Starting     st2-0.1.0.1
Building     st2-0.1.0.1
Failed to install st2-0.1.0.1
Build log ( /home/builder/.cabal/logs/ghc-8.6.1/st2-0.1.0.1-CbJGyIXS4oF2hNgYQrzSkG.log ):
cabal: Entering directory '/tmp/cabal-tmp-27548/st2-0.1.0.1'
Configuring st2-0.1.0.1...
Preprocessing library for st2-0.1.0.1..
Building library for st2-0.1.0.1..
[1 of 1] Compiling Control.Monad.ST2 ( src/Control/Monad/ST2.hs, dist/build/Control/Monad/ST2.o )

src/Control/Monad/ST2.hs:392:51: error:
    Unexpected kind variable ‘r’
    Perhaps you intended to use PolyKinds
    In the type signature for ‘runRegion#’
    |
392 | runRegion# :: forall (r :: RuntimeRep) (o :: TYPE r) s.
    |                                                   ^
cabal: Leaving directory '/tmp/cabal-tmp-27548/st2-0.1.0.1'
cabal: Error: some packages failed to install:
st2-0.1.0.1-CbJGyIXS4oF2hNgYQrzSkG failed during the building phase. The
exception was:
ExitFailure 1