===>  License APACHE20 accepted by the user
===>   elixir-exprotobuf-1.2.9 depends on file: /usr/local/sbin/pkg - found
===> Fetching all distfiles required by elixir-exprotobuf-1.2.9 for building
===>  Extracting for elixir-exprotobuf-1.2.9
=> SHA256 Checksum OK for bitwalker-exprotobuf-1.2.9_GH0.tar.gz.
===>  Patching for elixir-exprotobuf-1.2.9
===>   elixir-exprotobuf-1.2.9 depends on executable: elixir - found
===>   elixir-exprotobuf-1.2.9 depends on package: erlang-gpb>=0 - found
===>  Configuring for elixir-exprotobuf-1.2.9
===>  Building for elixir-exprotobuf-1.2.9
/bin/ln -s -f /usr/local/lib/erlang/lib/gpb-* /wrkdirs/exprotobuf-0cipiertest-port/work/exprotobuf-1.2.9/deps/gpb
Could not find Hex, which is needed to build dependency :gpb
Shall I install Hex? (if running non-interactively, use "mix local.hex --force") [Yn] *** Error code 1

Stop.
make: stopped in /exprotobuf-0cipiertest-port
1