diff --git a/changelogs/fragments/461-collection-dir.yml b/changelogs/fragments/461-collection-dir.yml
new file mode 100644
index 00000000..ad79f0bf
--- /dev/null
+++ b/changelogs/fragments/461-collection-dir.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - "Add ``--collection-dir`` to the ``antsibull-build`` ``collection`` and ``build-collection`` subcommands. Previously, the ``--collection-dir`` option was added to the wrong CLI argument parser and not exposed to users. (https://github.com/ansible-community/antsibull/pull/461)."
diff --git a/src/antsibull/cli/antsibull_build.py b/src/antsibull/cli/antsibull_build.py
index c81726a0..6f969670 100644
--- a/src/antsibull/cli/antsibull_build.py
+++ b/src/antsibull/cli/antsibull_build.py
@@ -331,8 +331,8 @@ def parse_args(program_name: str, args: List[str]) -> argparse.Namespace:
                                    ' versions which were included in this version of Ansible.'
                                    '  This is considered to be relative to --data-dir.'
                                    f'  The default is {DEFAULT_FILE_BASE}-X.Y.Z.deps')
-    build_parser.add_argument('--collection-dir', default='.',
-                              help='Directory to write collection to')
+    collection_parser.add_argument('--collection-dir', default='.',
+                                   help='Directory to write collection to')
 
     subparsers.add_parser('changelog',
                           parents=[build_write_data_parser, cache_parser],