Merge pull request #8788 from rabbitmq/rin/explicit-home-var-in-elixir-build

Explicitly set HOME in `elixir_build` rule

Author: michaelklishin

bazel/elixir/elixir_build.bzl

@@ -64,6 +64,7 @@ fi
 {maybe_install_erlang}
 
 export PATH="{erlang_home}"/bin:${{PATH}}
+export HOME="$(mktemp -d)"
 
 ABS_BUILD_DIR=$PWD/{build_path}
 ABS_RELEASE_DIR=$PWD/{release_path}