diff --git a/colcon_cache/base_handler/__init__.py b/colcon_cache/base_handler/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/colcon_cache/base_handler/cache.py b/colcon_cache/base_handler/cache.py
new file mode 100644
index 0000000..329c477
--- /dev/null
+++ b/colcon_cache/base_handler/cache.py
@@ -0,0 +1,31 @@
+# Copyright 2021 Ruffin White
+# Licensed under the Apache License, Version 2.0
+
+import os
+
+from colcon_clean.base_handler import BaseHandlerExtensionPoint
+from colcon_core.plugin_system import satisfies_version
+
+BASE_PATH = 'cache'
+
+
+class CacheBaseHandler(BaseHandlerExtensionPoint):
+    """Determin how cache paths for the workspace should be cleaned."""
+
+    def __init__(self):  # noqa: D107
+        super().__init__(BASE_PATH)
+        satisfies_version(
+            BaseHandlerExtensionPoint.EXTENSION_POINT_VERSION, '^1.0')
+
+    def add_arguments(self, *, parser):  # noqa: D102
+        parser.add_argument(
+            '--cache-base',
+            default=self.base_path,
+            help='The base path for all cache directories '
+                 '(default: {self.base_path})'.format_map(locals()))
+
+    def get_workspace_paths(self, *, args):  # noqa: D102
+        return [args.cache_base]
+
+    def get_package_paths(self, *, args, pkg):  # noqa: D102
+        return [os.path.join(args.cache_base, pkg.name)]
diff --git a/colcon_cache/cache/__init__.py b/colcon_cache/cache/__init__.py
index 8009d3f..8af078d 100644
--- a/colcon_cache/cache/__init__.py
+++ b/colcon_cache/cache/__init__.py
@@ -98,16 +98,16 @@ def dump(self, path):  # noqa: D102
                 sort_keys=True)
 
 
-def get_lockfile_path(package_build_base, verb_name):
+def get_lockfile_path(package_base_path, verb_name):
     """
     Get the lockfile path of a verb from the package build directory.
 
-    :param str package_build_base: The build directory of a package
+    :param str package_base_path: The base path of a package
     :param str verb_name: The invoked verb name
     :returns: The path for the lockfile
     :rtype: Path
     """
     return pathlib.Path(
-        package_build_base,
+        package_base_path,
         'cache',
         LOCKFILE_FILENAME.format_map(locals()))
diff --git a/colcon_cache/event_handler/__init__.py b/colcon_cache/event_handler/__init__.py
index 698b14b..a8d1c29 100644
--- a/colcon_cache/event_handler/__init__.py
+++ b/colcon_cache/event_handler/__init__.py
@@ -6,16 +6,16 @@
 from colcon_cache.cache import get_lockfile_path
 
 
-def get_previous_lockfile(package_build_base, verb_name):
+def get_previous_lockfile(package_base_path, verb_name):
     """
-    Get the lockfile of a verb from the package build directory.
+    Get the lockfile of a verb from the package base path.
 
-    :param str package_build_base: The build directory of a package
+    :param str package_base_path: The base path of a package
     :param str verb_name: The invoked verb name
     :returns: The previously persisted lockfile, otherwise None
     :rtype: CacheLockfile
     """
-    path = get_lockfile_path(package_build_base, verb_name)
+    path = get_lockfile_path(package_base_path, verb_name)
     if not path.exists():
         return None
     lockfile = CacheLockfile()
@@ -23,14 +23,14 @@ def get_previous_lockfile(package_build_base, verb_name):
     return lockfile
 
 
-def set_lockfile(package_build_base, verb_name, lockfile):
+def set_lockfile(package_base_path, verb_name, lockfile):
     """
     Persist the lockfile of a verb in the package build directory.
 
-    :param str package_build_base: The build directory of a package
+    :param str package_base_path: The build directory of a package
     :param str verb_name: The invoked verb name
     :param CacheLockfile lockfile: The lockfile of the invocation
     """
-    path = get_lockfile_path(package_build_base, verb_name)
+    path = get_lockfile_path(package_base_path, verb_name)
     path.parent.mkdir(parents=True, exist_ok=True)
     lockfile.dump(path)
diff --git a/colcon_cache/package_selection/modified.py b/colcon_cache/package_selection/modified.py
index e9bd149..cfcddf8 100644
--- a/colcon_cache/package_selection/modified.py
+++ b/colcon_cache/package_selection/modified.py
@@ -76,11 +76,8 @@ def select_packages(self, args, decorators):  # noqa: D102
 
             pkg = decorator.descriptor
 
-            package_build_base = os.path.join(
-                args.build_base, pkg.name)
-
             verb_lockfile = verb_handler_extension\
-                .get_current_lockfile(package_build_base)
+                .get_current_lockfile(args, pkg.name)
 
             package_kind = None
             if verb_lockfile is None:
diff --git a/colcon_cache/package_selection/valid.py b/colcon_cache/package_selection/valid.py
index 1f39a64..c65e7a2 100644
--- a/colcon_cache/package_selection/valid.py
+++ b/colcon_cache/package_selection/valid.py
@@ -2,8 +2,6 @@
 # Copyright 2021 Ruffin White
 # Licensed under the Apache License, Version 2.0
 
-import os
-
 from colcon_cache.verb_handler import get_verb_handler_extensions
 from colcon_core.package_selection import logger
 from colcon_core.package_selection import PackageSelectionExtensionPoint
@@ -45,14 +43,6 @@ def select_packages(self, args, decorators):  # noqa: D102
         else:
             assert False
 
-        if not hasattr(args, 'build_base'):
-            logger.warning(
-                "Ignoring '{argument}' since the invoked verb doesn't have a "
-                "'--build-base' argument and therefore can't access "
-                'information about the relative state of a package'
-                .format_map(locals()))
-            return
-
         verb_name = args.packages_select_cache_key
         if not verb_name:
             verb_name = args.verb_name
@@ -76,13 +66,10 @@ def select_packages(self, args, decorators):  # noqa: D102
 
             pkg = decorator.descriptor
 
-            package_build_base = os.path.join(
-                args.build_base, pkg.name)
-
             verb_lockfile = verb_handler_extension\
-                .get_current_lockfile(package_build_base)
+                .get_current_lockfile(args, pkg.name)
             reference_lockfile = verb_handler_extension\
-                .get_reference_lockfile(package_build_base)
+                .get_reference_lockfile(args, pkg.name)
             reference_name = verb_handler_extension.reference_name
 
             package_kind = None
diff --git a/colcon_cache/subverb/lock.py b/colcon_cache/subverb/lock.py
index 9682b70..ead6960 100644
--- a/colcon_cache/subverb/lock.py
+++ b/colcon_cache/subverb/lock.py
@@ -8,6 +8,7 @@
 from pathlib import Path
 
 from colcon_cache.subverb import CacheSubverbExtensionPoint
+from colcon_cache.verb_handler import add_verb_handler_arguments
 from colcon_core.argument_parser.destination_collector \
     import DestinationCollectorDecorator
 from colcon_core.event.job import JobUnselected
@@ -71,17 +72,13 @@ def __init__(self):  # noqa: D107
             CacheSubverbExtensionPoint.EXTENSION_POINT_VERSION, '^1.0')
 
     def add_arguments(self, *, parser):  # noqa: D102
-        parser.add_argument(
-            '--build-base',
-            default='build',
-            help='The base path for all build directories (default: build)')
-
         parser.add_argument(
             '--ignore-dependencies',
             action='store_true',
             help='Ignore dependencies when capturing caches (default: false)')
 
         add_executor_arguments(parser)
+        add_verb_handler_arguments(parser)
         add_event_handler_arguments(parser)
         add_packages_arguments(parser)
 
diff --git a/colcon_cache/task/lock/__init__.py b/colcon_cache/task/lock/__init__.py
index 209e2f6..ed13f81 100644
--- a/colcon_cache/task/lock/__init__.py
+++ b/colcon_cache/task/lock/__init__.py
@@ -17,7 +17,7 @@ def get_dependencies_lockfiles(args, dependencies):  # noqa: D103
                 lockfile = _cached_lockfiles[dep_path]
             else:
                 lockfile = get_previous_lockfile(
-                    package_build_base=dep_path,
+                    package_base_path=dep_path,
                     verb_name='cache')
                 _cached_lockfiles[dep_path] = lockfile
             dependencies_checksums[dep_name] = lockfile
diff --git a/colcon_cache/task/lock/dirhash.py b/colcon_cache/task/lock/dirhash.py
index 3699287..465c2c2 100644
--- a/colcon_cache/task/lock/dirhash.py
+++ b/colcon_cache/task/lock/dirhash.py
@@ -171,9 +171,9 @@ async def lock(self, *, additional_hooks=None):  # noqa: D102
             "Capturing dirhash cache of package in '{args.path}'"
             .format_map(locals()))
 
-        cache_base = Path(args.build_base, 'cache')
+        cache_base = Path(args.cache_base, 'cache')
         cache_base.mkdir(parents=True, exist_ok=True)
-        lockfile = get_previous_lockfile(args.build_base, 'cache')
+        lockfile = get_previous_lockfile(args.cache_base, 'cache')
         if lockfile is None:
             lockfile = CacheLockfile(lock_type=ENTRY_TYPE)
         assert lockfile.lock_type == ENTRY_TYPE
@@ -193,7 +193,7 @@ async def lock(self, *, additional_hooks=None):  # noqa: D102
                 lockfile.checksums.current
 
         pkg.metadata['lockfile'] = lockfile
-        set_lockfile(args.build_base, 'cache', lockfile)
+        set_lockfile(args.cache_base, 'cache', lockfile)
 
         return 0
 
diff --git a/colcon_cache/task/lock/git.py b/colcon_cache/task/lock/git.py
index dc52252..4eca2f0 100644
--- a/colcon_cache/task/lock/git.py
+++ b/colcon_cache/task/lock/git.py
@@ -78,9 +78,9 @@ async def lock(self, *, additional_hooks=None):  # noqa: D102
             "Capturing git cache of package in '{args.path}'"
             .format_map(locals()))
 
-        cache_base = Path(args.build_base, 'cache')
+        cache_base = Path(args.cache_base, 'cache')
         cache_base.mkdir(parents=True, exist_ok=True)
-        lockfile = get_previous_lockfile(args.build_base, 'cache')
+        lockfile = get_previous_lockfile(args.cache_base, 'cache')
         if lockfile is None:
             lockfile = CacheLockfile(lock_type=ENTRY_TYPE)
         assert lockfile.lock_type == ENTRY_TYPE
@@ -96,7 +96,7 @@ async def lock(self, *, additional_hooks=None):  # noqa: D102
         self.compute_current_checksums(args, lockfile)
 
         pkg.metadata['lockfile'] = lockfile
-        set_lockfile(args.build_base, 'cache', lockfile)
+        set_lockfile(args.cache_base, 'cache', lockfile)
 
         return 0
 
diff --git a/colcon_cache/verb_handler/__init__.py b/colcon_cache/verb_handler/__init__.py
index 24b4482..513c367 100644
--- a/colcon_cache/verb_handler/__init__.py
+++ b/colcon_cache/verb_handler/__init__.py
@@ -2,6 +2,8 @@
 # Copyright 2021 Ruffin White
 # Licensed under the Apache License, Version 2.0
 
+import os
+
 from colcon_cache.event_handler import get_previous_lockfile
 from colcon_core.plugin_system import instantiate_extensions
 from colcon_core.plugin_system import order_extensions_by_name
@@ -21,32 +23,51 @@ class VerbHandlerExtensionPoint:
     """The version of the package selection extension interface."""
     EXTENSION_POINT_VERSION = '1.0'
 
-    def __init__(self, verb_name, reference_name):  # noqa: D107
+    def __init__(self, base_path, verb_name, reference_name):  # noqa: D107
         # TODO: find better alternative than perhaps using params
+        self.base_path = base_path
         self.verb_name = verb_name
         self.reference_name = reference_name
 
-    def get_current_lockfile(self, package_build_base):
+    def add_arguments(self, *, parser):
+        """
+        Add command line arguments specific to the workspace base.
+
+        This method must be overridden in a subclass.
+
+        :param parser: The argument parser
+        """
+        raise NotImplementedError()
+
+    def get_current_lockfile(self, args, pkg_name):
         """
         Get current lockfile for verb.
 
         This method can be overridden in a subclass.
 
-        :param package_build_base: Base build path for package
+        :param args: Args with respective base path
+        :param pkg_name: Name for package
         :returns: A lockfile, or None
         """
-        return get_previous_lockfile(package_build_base, self.verb_name)
+        reference_base_path = getattr(args, self.reference_name + '_base')
+        package_reference_base = os.path.join(reference_base_path, pkg_name)
+        return get_previous_lockfile(
+            package_reference_base, self.verb_name)
 
-    def get_reference_lockfile(self, package_build_base):
+    def get_reference_lockfile(self, args, pkg_name):
         """
         Get reference lockfile for verb.
 
         This method can be overridden in a subclass.
 
-        :param package_build_base: Base build path for package
+        :param args: Args with respective base path
+        :param pkg_name: Name for package
         :returns: A lockfile, or None
         """
-        return get_previous_lockfile(package_build_base, self.reference_name)
+        reference_base_path = getattr(args, self.reference_name + '_base')
+        package_reference_base = os.path.join(reference_base_path, pkg_name)
+        return get_previous_lockfile(
+            package_reference_base, self.reference_name)
 
     def get_job_lockfile(self, job):
         """
@@ -57,7 +78,24 @@ def get_job_lockfile(self, job):
         :param jobs: The job from `event[1]`
         :returns: A lockfile, or None
         """
-        return self.get_reference_lockfile(job.task_context.args.build_base)
+        reference_pkg_base_path = getattr(
+            job.task_context.args, self.reference_name + '_base')
+        return get_previous_lockfile(
+            reference_pkg_base_path, self.reference_name)
+
+
+def add_verb_handler_arguments(parser):
+    """
+    Add the command line arguments for the verb handler extensions.
+
+    :param parser: The argument parser
+    """
+    group = parser.add_argument_group(title='Verb handler arguments')
+    extensions = get_verb_handler_extensions()
+
+    for key in sorted(extensions.keys()):
+        extension = extensions[key]
+        extension.add_arguments(parser=group)
 
 
 def get_verb_handler_extensions():
diff --git a/colcon_cache/verb_handler/build.py b/colcon_cache/verb_handler/build.py
index b2a0c8d..f2aeaaf 100644
--- a/colcon_cache/verb_handler/build.py
+++ b/colcon_cache/verb_handler/build.py
@@ -4,6 +4,7 @@
 from colcon_cache.verb_handler import VerbHandlerExtensionPoint
 from colcon_core.plugin_system import satisfies_version
 
+BASE_PATH = 'build'
 VERB_NAME = 'build'
 REFERENCE_NAME = 'cache'
 
@@ -12,6 +13,13 @@ class BuildVerbHandler(VerbHandlerExtensionPoint):
     """Determin how lockfiles for the build verb should be handled."""
 
     def __init__(self):  # noqa: D107
-        super().__init__(VERB_NAME, REFERENCE_NAME)
+        super().__init__(BASE_PATH, VERB_NAME, REFERENCE_NAME)
         satisfies_version(
             VerbHandlerExtensionPoint.EXTENSION_POINT_VERSION, '^1.0')
+
+    def add_arguments(self, *, parser):  # noqa: D102
+        parser.add_argument(
+            '--build-base',
+            default=self.base_path,
+            help='The base path for all build directories '
+                 '(default: {self.base_path})'.format_map(locals()))
diff --git a/colcon_cache/verb_handler/cache.py b/colcon_cache/verb_handler/cache.py
index f45848e..3716ebc 100644
--- a/colcon_cache/verb_handler/cache.py
+++ b/colcon_cache/verb_handler/cache.py
@@ -4,6 +4,7 @@
 from colcon_cache.verb_handler import VerbHandlerExtensionPoint
 from colcon_core.plugin_system import satisfies_version
 
+BASE_PATH = 'cache'
 VERB_NAME = 'cache'
 REFERENCE_NAME = None
 
@@ -12,11 +13,18 @@ class CacheVerbHandler(VerbHandlerExtensionPoint):
     """Determin how lockfiles for the cache verb should be handled."""
 
     def __init__(self):  # noqa: D107
-        super().__init__(VERB_NAME, REFERENCE_NAME)
+        super().__init__(BASE_PATH, VERB_NAME, REFERENCE_NAME)
         satisfies_version(
             VerbHandlerExtensionPoint.EXTENSION_POINT_VERSION, '^1.0')
 
-    def get_reference_lockfile(self, package_build_base):  # noqa: D102
+    def add_arguments(self, *, parser):  # noqa: D102
+        parser.add_argument(
+            '--cache-base',
+            default=self.base_path,
+            help='The base path for all cache directories '
+                 '(default: {self.base_path})'.format_map(locals()))
+
+    def get_reference_lockfile(self, args, pkg_name):  # noqa: D102
         return None
 
     def get_job_lockfile(self, job):  # noqa: D102
diff --git a/colcon_cache/verb_handler/list.py b/colcon_cache/verb_handler/list.py
new file mode 100644
index 0000000..7dabb2b
--- /dev/null
+++ b/colcon_cache/verb_handler/list.py
@@ -0,0 +1,27 @@
+# Copyright 2021 Ruffin White
+# Licensed under the Apache License, Version 2.0
+
+from colcon_cache.verb_handler import VerbHandlerExtensionPoint
+from colcon_core.plugin_system import satisfies_version
+
+BASE_PATH = None
+VERB_NAME = None
+REFERENCE_NAME = None
+
+
+class ListVerbHandler(VerbHandlerExtensionPoint):
+    """Determin how lockfiles for the list verb should be handled."""
+
+    def __init__(self):  # noqa: D107
+        super().__init__(BASE_PATH, VERB_NAME, REFERENCE_NAME)
+        satisfies_version(
+            VerbHandlerExtensionPoint.EXTENSION_POINT_VERSION, '^1.0')
+
+    def add_arguments(self, *, parser):  # noqa: D102
+        pass
+
+    def get_reference_lockfile(self, args, pkg_name):  # noqa: D102
+        return None
+
+    def get_job_lockfile(self, job):  # noqa: D102
+        return None
diff --git a/colcon_cache/verb_handler/test.py b/colcon_cache/verb_handler/test.py
index f7afe62..d7bdc03 100644
--- a/colcon_cache/verb_handler/test.py
+++ b/colcon_cache/verb_handler/test.py
@@ -4,6 +4,7 @@
 from colcon_cache.verb_handler import VerbHandlerExtensionPoint
 from colcon_core.plugin_system import satisfies_version
 
+BASE_PATH = 'build'
 VERB_NAME = 'test'
 REFERENCE_NAME = 'build'
 
@@ -12,6 +13,13 @@ class TestVerbHandler(VerbHandlerExtensionPoint):
     """Determin how lockfiles for the test verb should be handled."""
 
     def __init__(self):  # noqa: D107
-        super().__init__(VERB_NAME, REFERENCE_NAME)
+        super().__init__(BASE_PATH, VERB_NAME, REFERENCE_NAME)
         satisfies_version(
             VerbHandlerExtensionPoint.EXTENSION_POINT_VERSION, '^1.0')
+
+    def add_arguments(self, *, parser):  # noqa: D102
+        parser.add_argument(
+            '--test-result-base',
+            default=self.base_path,
+            help='The base path for all test_result directories '
+                 '(default: {self.base_path})'.format_map(locals()))
diff --git a/setup.cfg b/setup.cfg
index 584e3d6..a965cb7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -68,6 +68,8 @@ filterwarnings =
 junit_suite_name = colcon-cache
 
 [options.entry_points]
+colcon_clean.base_handler =
+    cache = colcon_cache.base_handler.cache:CacheBaseHandler
 colcon_core.event_handler =
     cache_lockfile = colcon_cache.event_handler.lockfile:LockfileEventHandler
 colcon_core.extension_point =
@@ -91,7 +93,7 @@ colcon_cache.task.lock =
 colcon_cache.verb_handler =
     build = colcon_cache.verb_handler.build:BuildVerbHandler
     cache = colcon_cache.verb_handler.cache:CacheVerbHandler
-    list = colcon_cache.verb_handler.cache:CacheVerbHandler
+    list = colcon_cache.verb_handler.list:ListVerbHandler
     test = colcon_cache.verb_handler.test:TestVerbHandler
 
 [flake8]
diff --git a/test/package_selection/test_valid.py b/test/package_selection/test_valid.py
index 92a91c8..6880fef 100644
--- a/test/package_selection/test_valid.py
+++ b/test/package_selection/test_valid.py
@@ -18,11 +18,13 @@ def test_valid():
 
     # TODO: check event log for warning by mocking logger
     args = Object()
+    args.packages_select_cache_key = 'cache'
     args.packages_select_cache_invalid = True
     args.packages_skip_cache_valid = False
     valid_package_selection.select_packages(args, decorators)
 
     args = Object()
+    args.packages_select_cache_key = 'cache'
     args.packages_select_cache_invalid = False
     args.packages_skip_cache_valid = True
     valid_package_selection.select_packages(args, decorators)