diff --git a/cachi2/core/package_managers/yarn_classic/main.py b/cachi2/core/package_managers/yarn_classic/main.py
index e19b8f826..4b6c160f4 100644
--- a/cachi2/core/package_managers/yarn_classic/main.py
+++ b/cachi2/core/package_managers/yarn_classic/main.py
@@ -6,6 +6,7 @@
 from cachi2.core.errors import PackageManagerError, PackageRejected
 from cachi2.core.models.input import Request
 from cachi2.core.models.output import Component, EnvironmentVariable, RequestOutput
+from cachi2.core.models.property_semantics import PropertySet
 from cachi2.core.package_managers.yarn.utils import (
     VersionsRange,
     extract_yarn_version_from_env,
@@ -61,14 +62,16 @@ def _ensure_mirror_dir_exists(output_dir: RootedPath) -> None:
     for package in request.yarn_packages:
         package_path = request.source_dir.join_within_root(package.path)
         _ensure_mirror_dir_exists(request.output_dir)
-        _resolve_yarn_project(Project.from_source_dir(package_path), request.output_dir)
+        components.extend(
+            _resolve_yarn_project(Project.from_source_dir(package_path), request.output_dir)
+        )
 
     return RequestOutput.from_obj_list(
         components, _generate_build_environment_variables(), project_files=[]
     )
 
 
-def _resolve_yarn_project(project: Project, output_dir: RootedPath) -> None:
+def _resolve_yarn_project(project: Project, output_dir: RootedPath) -> list[Component]:
     """Process a request for a single yarn source directory."""
     log.info(f"Fetching the yarn dependencies at the subpath {project.source_dir}")
 
@@ -79,6 +82,25 @@ def _resolve_yarn_project(project: Project, output_dir: RootedPath) -> None:
     packages = resolve_packages(project, output_dir.join_within_root(MIRROR_DIR))
     _verify_no_offline_mirror_collisions(packages)
 
+    return _create_sbom_components(packages)
+
+
+def _create_sbom_components(packages: Iterable[YarnClassicPackage]) -> list[Component]:
+    """Create SBOM components from the given yarn packages."""
+    result = []
+    for package in packages:
+        properties = PropertySet(npm_development=package.dev).to_properties()
+        result.append(
+            Component(
+                name=package.name,
+                purl=package.purl,
+                version=package.version,
+                properties=properties,
+            )
+        )
+
+    return result
+
 
 def _fetch_dependencies(source_dir: RootedPath, env: dict[str, str]) -> None:
     """Fetch dependencies using 'yarn install'.
diff --git a/tests/unit/package_managers/yarn_classic/test_main.py b/tests/unit/package_managers/yarn_classic/test_main.py
index 030b99217..cefdc0799 100644
--- a/tests/unit/package_managers/yarn_classic/test_main.py
+++ b/tests/unit/package_managers/yarn_classic/test_main.py
@@ -1,3 +1,4 @@
+import itertools
 import json
 from pathlib import Path
 from typing import Any, Iterable
@@ -54,19 +55,48 @@ def test_generate_build_environment_variables(
 
 
 @pytest.mark.parametrize(
-    "input_request, components",
-    [
+    "input_request, package_components",
+    (
         pytest.param(
             [{"type": "yarn", "path": "."}],
-            [],
+            [
+                [
+                    Component(
+                        name="foo",
+                        purl="pkg:npm/foo@1.0.0",
+                        version="1.0.0",
+                    ),
+                    Component(name="bar", purl="pkg:npm/bar@2.0.0", version="2.0.0"),
+                ],
+            ],
             id="single_input_package",
         ),
         pytest.param(
             [{"type": "yarn", "path": "."}, {"type": "yarn", "path": "./path"}],
-            [],
+            [
+                [
+                    Component(
+                        name="foo",
+                        purl="pkg:npm/foo@1.0.0",
+                        version="1.0.0",
+                    ),
+                ],
+                [
+                    Component(
+                        name="bar",
+                        purl="pkg:npm/bar@2.0.0",
+                        version="2.0.0",
+                    ),
+                    Component(
+                        name="baz",
+                        purl="pkg:npm/baz@3.0.0",
+                        version="3.0.0",
+                    ),
+                ],
+            ],
             id="multiple_input_packages",
         ),
-    ],
+    ),
     indirect=["input_request"],
 )
 @mock.patch("cachi2.core.package_managers.yarn_classic.main._resolve_yarn_project")
@@ -75,26 +105,28 @@ def test_fetch_yarn_source(
     mock_create_project: mock.Mock,
     mock_resolve_yarn: mock.Mock,
     input_request: Request,
+    package_components: list[Component],
     yarn_classic_env_variables: list[EnvironmentVariable],
-    components: list[Component],
 ) -> None:
-    expected_output = RequestOutput(
-        components=components,
-        build_config=BuildConfig(environment_variables=yarn_classic_env_variables),
-    )
     package_dirs = [
         input_request.source_dir.join_within_root(p.path) for p in input_request.packages
     ]
     projects = [_prepare_project(path, {}) for path in package_dirs]
+
     mock_create_project.side_effect = projects
+    mock_resolve_yarn.side_effect = package_components
 
     output = fetch_yarn_source(input_request)
 
     mock_create_project.assert_has_calls([mock.call(path) for path in package_dirs])
     mock_resolve_yarn.assert_has_calls([mock.call(p, input_request.output_dir) for p in projects])
 
-    assert input_request.output_dir.join_within_root("deps/yarn-classic").path.exists()
+    expected_output = RequestOutput(
+        components=list(itertools.chain.from_iterable(package_components)),
+        build_config=BuildConfig(environment_variables=yarn_classic_env_variables),
+    )
     assert output == expected_output
+    assert input_request.output_dir.join_within_root(MIRROR_DIR).path.exists()
 
 
 @mock.patch("cachi2.core.package_managers.yarn_classic.main.resolve_packages")