diff --git a/hydra/core/override_parser/types.py b/hydra/core/override_parser/types.py
index c3da476c5d0..7b835e9b1d9 100644
--- a/hydra/core/override_parser/types.py
+++ b/hydra/core/override_parser/types.py
@@ -1,10 +1,12 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
 import decimal
 import fnmatch
+import warnings
 from copy import copy
 from dataclasses import dataclass, field
 from enum import Enum
 from random import shuffle
+from textwrap import dedent
 from typing import Any, Callable, Dict, Iterator, List, Optional, Set, Union, cast
 
 from omegaconf import OmegaConf
@@ -235,6 +237,19 @@ class Override:
     # Configs repo
     config_loader: Optional[ConfigLoader] = None
 
+    def __post_init__(self) -> None:
+        if self.pkg2 is not None:
+            # DEPRECATED: remove in 1.1
+
+            msg = dedent(
+                """\n
+                    Support for renaming packages via the command line is deprecated since Hydra 1.0.5.
+                    The support will be removed in Hydra 1.1.
+                    For more details, see https://github.com/facebookresearch/hydra/issues/1140.
+                    """
+            )
+            warnings.warn(message=msg, category=UserWarning)
+
     def is_delete(self) -> bool:
         """
         :return: True if this override represents a deletion of a config value or config group option
diff --git a/news/1140.api_change b/news/1140.api_change
new file mode 100644
index 00000000000..3ff0aa22e14
--- /dev/null
+++ b/news/1140.api_change
@@ -0,0 +1 @@
+Deprecate support for renaming packages via the command line.
\ No newline at end of file
diff --git a/tests/test_config_loader.py b/tests/test_config_loader.py
index 7f1d0bea3dd..a32e8e76610 100644
--- a/tests/test_config_loader.py
+++ b/tests/test_config_loader.py
@@ -122,7 +122,7 @@ def test_load_with_optional_default(self, path: str) -> None:
         ],
     )
     def test_load_changing_group_in_default(
-        self, path: str, override: str, expected: Dict[Any, Any]
+        self, path: str, override: str, expected: Dict[Any, Any], recwarn: Any
     ) -> None:
         config_loader = ConfigLoaderImpl(
             config_search_path=create_config_search_path(path)
@@ -158,7 +158,7 @@ def test_load_changing_group_in_default(
         ],
     )
     def test_load_changing_group_and_package_in_default(
-        self, path: str, overrides: List[str], expected: Any
+        self, path: str, overrides: List[str], expected: Any, recwarn: Any
     ) -> None:
         config_loader = ConfigLoaderImpl(
             config_search_path=create_config_search_path(f"{path}/package_tests")
@@ -205,7 +205,7 @@ def test_load_changing_group_and_package_in_default(
         ],
     )
     def test_override_compose_two_package_one_group(
-        self, path: str, overrides: List[str], expected: Any
+        self, path: str, overrides: List[str], expected: Any, recwarn: Any
     ) -> None:
         config_loader = ConfigLoaderImpl(
             config_search_path=create_config_search_path(f"{path}/package_tests")
@@ -1042,7 +1042,7 @@ def test_complex_defaults(overrides: Any, expected: Any) -> None:
     ],
 )
 def test_apply_overrides_to_defaults(
-    input_defaults: List[str], overrides: List[str], expected: Any
+    input_defaults: List[str], overrides: List[str], expected: Any, recwarn: Any
 ) -> None:
     defaults = ConfigLoaderImpl._parse_defaults(
         OmegaConf.create({"defaults": input_defaults})
diff --git a/tests/test_examples/test_advanced_package_overrides.py b/tests/test_examples/test_advanced_package_overrides.py
index d1e3783bd7a..a59b9d6c29c 100644
--- a/tests/test_examples/test_advanced_package_overrides.py
+++ b/tests/test_examples/test_advanced_package_overrides.py
@@ -19,20 +19,6 @@ def test_advanced_package_override_simple(tmpdir: Path) -> None:
     }
 
 
-def test_advanced_package_override_simple_with_cli_pakcage_override(
-    tmpdir: Path,
-) -> None:
-    cmd = [
-        "examples/advanced/package_overrides/simple.py",
-        "hydra.run.dir=" + str(tmpdir),
-        "db@:source=mysql",
-    ]
-    result, _err = get_run_output(cmd)
-    assert OmegaConf.create(result) == {
-        "source": {"driver": "mysql", "user": "omry", "pass": "secret"}
-    }
-
-
 def test_advanced_package_override_two_packages(tmpdir: Path) -> None:
     cmd = [
         "examples/advanced/package_overrides/two_packages.py",
@@ -43,16 +29,3 @@ def test_advanced_package_override_two_packages(tmpdir: Path) -> None:
         "source": {"driver": "mysql", "user": "omry", "pass": "secret"},
         "destination": {"driver": "mysql", "user": "omry", "pass": "secret"},
     }
-
-
-def test_advanced_package_override_two_packages_with_cli_override(tmpdir: Path) -> None:
-    cmd = [
-        "examples/advanced/package_overrides/two_packages.py",
-        "hydra.run.dir=" + str(tmpdir),
-        "db@destination:backup=mysql",
-    ]
-    result, _err = get_run_output(cmd)
-    assert OmegaConf.create(result) == {
-        "source": {"driver": "mysql", "user": "omry", "pass": "secret"},
-        "backup": {"driver": "mysql", "user": "omry", "pass": "secret"},
-    }
diff --git a/tests/test_overrides_parser.py b/tests/test_overrides_parser.py
index 5e7af0e2572..eebe58d8bac 100644
--- a/tests/test_overrides_parser.py
+++ b/tests/test_overrides_parser.py
@@ -658,7 +658,7 @@ def test_primitive(value: str, expected: Any) -> None:
         pytest.param("abc@:pkg2=xyz", True, id="rename_from_current"),
     ],
 )
-def test_key_rename(value: str, expected: bool) -> None:
+def test_key_rename(value: str, expected: bool, recwarn: Any) -> None:
     ret = parse_rule(value, "override")
     assert ret.is_package_rename() == expected
 
@@ -917,7 +917,7 @@ def test_parse_overrides() -> None:
         pytest.param("~key@:pkg2=value", "~key@:pkg2", id="~key@:pkg2"),
     ],
 )
-def test_get_key_element(override: str, expected: str) -> None:
+def test_get_key_element(override: str, expected: str, recwarn: Any) -> None:
     ret = parse_rule(override, "override")
     assert ret.get_key_element() == expected