{ "defaults":
  { "type": "configure"
  , "target": "defaults (unconfigured)"
  , "arguments_config": ["TOOLCHAIN_CONFIG"]
  , "config":
    { "type": "let*"
    , "bindings":
      [ [ "PKGCONFIG toolchain"
        , { "type": "lookup"
          , "map":
            { "type": "var"
            , "name": "TOOLCHAIN_CONFIG"
            , "default": {"type": "empty_map"}
            }
          , "key": "PKGCONFIG"
          , "default": {"type": "empty_map"}
          }
        ]
      , [ "pkg-config"
        , { "type": "lookup"
          , "map": {"type": "var", "name": "PKGCONFIG toolchain"}
          , "key": "pkg-config"
          , "default": "pkg-config"
          }
        ]
      , [ "PATH"
        , { "type": "lookup"
          , "map": {"type": "var", "name": "PKGCONFIG toolchain"}
          , "key": "PATH"
          , "default": []
          }
        ]
      , [ "PKG_CONFIG_PATH"
        , { "type": "lookup"
          , "map": {"type": "var", "name": "PKGCONFIG toolchain"}
          , "key": "PKG_CONFIG_PATH"
          , "default": []
          }
        ]
      ]
    , "body": {"type": "env", "vars": ["pkg-config", "PATH", "PKG_CONFIG_PATH"]}
    }
  }
, "defaults (unconfigured)":
  { "type": "defaults"
  , "arguments_config": ["pkg-config", "PATH", "PKG_CONFIG_PATH"]
  , "pkg-config": [{"type": "var", "name": "pkg-config"}]
  , "PATH": {"type": "var", "name": "PATH"}
  , "PKG_CONFIG_PATH": {"type": "var", "name": "PKG_CONFIG_PATH"}
  }
}