Resolving dependencies...
Starting     StateVar-1.2
Starting     cabal-doctest-1.0.8
Starting     exceptions-0.10.4
Starting     base-orphans-0.8.2
Building     StateVar-1.2
Building     cabal-doctest-1.0.8
Building     base-orphans-0.8.2
Building     exceptions-0.10.4
Completed    StateVar-1.2
Starting     ghc-paths-0.1.0.12
Completed    cabal-doctest-1.0.8
Starting     ghc-source-gen-0.4.0.0
Building     ghc-source-gen-0.4.0.0
Completed    exceptions-0.10.4
Starting     lens-family-core-2.0.0
Completed    base-orphans-0.8.2
Starting     primitive-0.7.0.1
Building     lens-family-core-2.0.0
Building     ghc-paths-0.1.0.12
Building     primitive-0.7.0.1
Completed    ghc-paths-0.1.0.12
Starting     random-1.1
Building     random-1.1
Completed    lens-family-core-2.0.0
Starting     tagged-0.8.6
Building     tagged-0.8.6
Completed    ghc-source-gen-0.4.0.0
Starting     th-abstraction-0.3.2.0
Building     th-abstraction-0.3.2.0
Completed    random-1.1
Starting     transformers-compat-0.6.5
Building     transformers-compat-0.6.5
Completed    tagged-0.8.6
Starting     contravariant-1.5.2
Building     contravariant-1.5.2
Completed    th-abstraction-0.3.2.0
Starting     lens-family-2.0.0
Completed    transformers-compat-0.6.5
Starting     temporary-1.3
Building     lens-family-2.0.0
Building     temporary-1.3
Completed    contravariant-1.5.2
Starting     distributive-0.6.2
Completed    temporary-1.3
Completed    primitive-0.7.0.1
Starting     vector-0.12.1.2
Building     vector-0.12.1.2
Completed    lens-family-2.0.0
Building     distributive-0.6.2
Completed    distributive-0.6.2
Starting     comonad-5.0.6
Building     comonad-5.0.6
Completed    comonad-5.0.6
Starting     bifunctors-5.5.7
Building     bifunctors-5.5.7
Completed    bifunctors-5.5.7
Starting     profunctors-5.5.2
Building     profunctors-5.5.2
Completed    profunctors-5.5.2
Completed    vector-0.12.1.2
Starting     proto-lens-0.7.0.0
Building     proto-lens-0.7.0.0
Completed    proto-lens-0.7.0.0
Starting     proto-lens-runtime-0.7.0.0
Building     proto-lens-runtime-0.7.0.0
Completed    proto-lens-runtime-0.7.0.0
Starting     proto-lens-protoc-0.7.0.0
Building     proto-lens-protoc-0.7.0.0
Completed    proto-lens-protoc-0.7.0.0
Starting     proto-lens-setup-0.4.0.4
Building     proto-lens-setup-0.4.0.4
Completed    proto-lens-setup-0.4.0.4
Starting     proto-lens-protobuf-types-0.7.0.0
Building     proto-lens-protobuf-types-0.7.0.0
Failed to install proto-lens-protobuf-types-0.7.0.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/proto-lens-protobuf-types-0.7.0.0-STrx91SSDw2wJPOXxTIrW.log ):
cabal: Entering directory '/tmp/cabal-tmp-12312/proto-lens-protobuf-types-0.7.0.0'
[1 of 1] Compiling Main             ( /tmp/cabal-tmp-12312/proto-lens-protobuf-types-0.7.0.0/dist/setup/setup.hs, /tmp/cabal-tmp-12312/proto-lens-protobuf-types-0.7.0.0/dist/setup/Main.o )
Linking /tmp/cabal-tmp-12312/proto-lens-protobuf-types-0.7.0.0/dist/setup/setup ...
Configuring proto-lens-protobuf-types-0.7.0.0...
==========
Error: couldn't find the executable "protoc" in your $PATH.
    Follow the installation instructions at https://google.github.io/proto-lens/installing-protoc.html .
==========
Missing executable "protoc"
CallStack (from HasCallStack):
  error, called at src/Data/ProtoLens/Setup.hs:371:13 in proto-lens-setup-0.4.0.4-1hKrYGa3dOLBmQvxn41R3W:Data.ProtoLens.Setup
cabal: Leaving directory '/tmp/cabal-tmp-12312/proto-lens-protobuf-types-0.7.0.0'
cabal: Error: some packages failed to install:
proto-lens-protobuf-types-0.7.0.0-STrx91SSDw2wJPOXxTIrW failed during the
building phase. The exception was:
ExitFailure 1