message: Leave final phase blank for devtools
diff: "package_name" : "axomdevtools",
  "package_version" : "fakeversion",
  "package_source_dir" : "../..",
  -"package_final_phase" : "fakestep",
  +"package_final_phase" : "",
  "spack_url": "https://github.com/spack/spack",
  "spack_commit": "e4c1cb380beb088393e47ba9caa27a2e5953b4db",
  "spack_configs_path": "scripts/spack/devtools_configs",
  