node ./scripts/functional_tests.js --esFrom=source
 info  Installing from source
   │ info  source path: /home/sreynolds/kibana/elasticsearch
   │ info  install path: /home/sreynolds/kibana/kibana/.es/test-v4ct5ckgxnm
   │ info  license: oss
   │ info  on HEAD at 053779d202567ea34577525eb622236c08da68cb
   │ info  0 locally modified file(s)
   │ info  ./gradlew :distribution:archives:oss-tar:assemble
   │ERROR  Project evaluation failed including an error in afterEvaluate {}. Run with --stacktrace for details of the afterEvaluate {} error.
   │ERROR
   │ERROR  FAILURE: Build failed with an exception.
   │ERROR
   │ERROR  * Where:
   │ERROR  Build file '/home/sreynolds/kibana/elasticsearch/benchmarks/build.gradle' line: 31
   │ERROR
   │ERROR  * What went wrong:
   │ERROR  A problem occurred evaluating project ':benchmarks'.
   │ERROR  > Failed to apply plugin [id 'elasticsearch.build']
   │ERROR     > JAVA_HOME must be set to build Elasticsearch
   │ERROR
   │ERROR  * Try:
   │ERROR  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
   │ERROR
   │ERROR  * Get more help at https://help.gradle.org
   │ERROR
   │ERROR  BUILD FAILED in 6s
Error: unable to build ES