cmake/Tests/RunCMake/CMakePresets/EmptyEnv.json.in

{
  "version": 1,
  "configurePresets": [
    {
      "name": "EmptyEnv",
      "generator": "@RunCMake_GENERATOR@",
      "binaryDir": "${sourceDir}/build",
      "cacheVariables": {
        "MY_VAR": "$env{}"
      }
    }
  ]
}