diff --git a/cachi2/core/package_managers/yarn_classic/workspaces.py b/cachi2/core/package_managers/yarn_classic/workspaces.py
index de1b0c6e0..314bcc82c 100644
--- a/cachi2/core/package_managers/yarn_classic/workspaces.py
+++ b/cachi2/core/package_managers/yarn_classic/workspaces.py
@@ -76,7 +76,14 @@ def _extract_workspaces_globs(
     package: dict[str, Any],
 ) -> list[str]:
     """Extract globs from workspaces entry in package dict."""
+    # This could be an Array or an Array nested in an Object.
+    # Official docs mentioning the former:
+    #   https://classic.yarnpkg.com/lang/en/docs/workspaces/
+    # Official blog containing a hint about the latter:
+    #   https://classic.yarnpkg.com/lang/en/docs/workspaces/
     workspaces_globs = package.get("workspaces", [])
+    if isinstance(workspaces_globs, dict):
+        workspaces_globs = workspaces_globs.get("packages", [])
     return workspaces_globs
 
 
diff --git a/tests/unit/package_managers/yarn_classic/test_workspaces.py b/tests/unit/package_managers/yarn_classic/test_workspaces.py
index e9aaea70e..778e357c2 100644
--- a/tests/unit/package_managers/yarn_classic/test_workspaces.py
+++ b/tests/unit/package_managers/yarn_classic/test_workspaces.py
@@ -56,10 +56,26 @@ def test_workspaces_could_be_parsed(
     assert result == expected_result
 
 
-def test_extracting_workspace_globs_works_with_globs_deined_in_list() -> None:
-    package = {"workspaces": ["foo"]}
+@pytest.mark.parametrize(
+    "package, expected",
+    [
+        pytest.param(
+            {"workspaces": ["foo"]},
+            ["foo"],
+            id="workspaces_defined_in_an_array",
+        ),
+        pytest.param(
+            {"workspaces": {"packages": ["foo"]}},
+            ["foo"],
+            id="workspaces_defined_in_an_array_within_an_object",
+        ),
+    ],
+)
+def test_extracting_workspace_globs_works_for_all_types_of_workspaces(
+    package: dict,
+    expected: list,
+) -> None:
 
-    expected = ["foo"]
     result = _extract_workspaces_globs(package)
 
     assert expected == result