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     hashable-1.2.7.0
Starting     mtl-compat-0.2.2
Starting     dependent-sum-0.5
Starting     th-abstraction-0.3.1.0
Building     th-abstraction-0.3.1.0
Building     dependent-sum-0.5
Building     hashable-1.2.7.0
Building     mtl-compat-0.2.2
Completed    mtl-compat-0.2.2
Starting     transformers-compat-0.6.5
Building     transformers-compat-0.6.5
Completed    dependent-sum-0.5
Starting     dependent-map-0.2.4.0
Building     dependent-map-0.2.4.0
Completed    hashable-1.2.7.0
Starting     async-2.2.2
Building     async-2.2.2
Completed    transformers-compat-0.6.5
Completed    th-abstraction-0.3.1.0
Starting     deriving-compat-0.5.6
Building     deriving-compat-0.5.6
Completed    dependent-map-0.2.4.0
Completed    async-2.2.2
Starting     protolude-0.2.3
Building     protolude-0.2.3
Completed    deriving-compat-0.5.6
Completed    protolude-0.2.3
Starting     rock-0.1.0.0
Building     rock-0.1.0.0
Failed to install rock-0.1.0.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/rock-0.1.0.0-3nyOzytaNi7DdKjdEnUPQk.log ):
cabal: Entering directory '/tmp/cabal-tmp-5189/rock-0.1.0.0'
Configuring rock-0.1.0.0...
Preprocessing library for rock-0.1.0.0..
Building library for rock-0.1.0.0..
[1 of 5] Compiling Rock.HashTag     ( src/Rock/HashTag.hs, dist/build/Rock/HashTag.o )
[2 of 5] Compiling Rock.Hashed      ( src/Rock/Hashed.hs, dist/build/Rock/Hashed.o )
[3 of 5] Compiling Rock.Traces      ( src/Rock/Traces.hs, dist/build/Rock/Traces.o )
[4 of 5] Compiling Rock.Core        ( src/Rock/Core.hs, dist/build/Rock/Core.o )

src/Rock/Core.hs:130:54: error:
    Ambiguous occurrence ‘Ap’
    It could refer to either ‘Strict.Ap’,
                             imported from ‘Protolude’ at src/Rock/Core.hs:13:1-16
                             (and originally defined in ‘Data.Monoid’)
                          or ‘Rock.Core.Ap’, defined at src/Rock/Core.hs:59:3
    |
130 |   Blocked b1 <*> Blocked b2 = Blocked $ BlockedTask (Ap b1 b2) pure
    |                                                      ^^

src/Rock/Core.hs:170:20: error:
    Ambiguous occurrence ‘Ap’
    It could refer to either ‘Strict.Ap’,
                             imported from ‘Protolude’ at src/Rock/Core.hs:13:1-16
                             (and originally defined in ‘Data.Monoid’)
                          or ‘Rock.Core.Ap’, defined at src/Rock/Core.hs:59:3
    |
170 | transFetchBlock f (Ap b1 b2) = transFetchBlockedTask f b1 <*> transFetchBlockedTask f b2
    |                    ^^

src/Rock/Core.hs:224:26: error:
    Ambiguous occurrence ‘Ap’
    It could refer to either ‘Strict.Ap’,
                             imported from ‘Protolude’ at src/Rock/Core.hs:13:1-16
                             (and originally defined in ‘Data.Monoid’)
                          or ‘Rock.Core.Ap’, defined at src/Rock/Core.hs:59:3
    |
224 | runBlock strategy rules (Ap bf bx) =
    |                          ^^
cabal: Leaving directory '/tmp/cabal-tmp-5189/rock-0.1.0.0'
cabal: Error: some packages failed to install:
rock-0.1.0.0-3nyOzytaNi7DdKjdEnUPQk failed during the building phase. The
exception was:
ExitFailure 1