diff --git a/.github/workflows/antsibull-build.yml b/.github/workflows/antsibull-build.yml
index a4a6da33..0ac9c60a 100644
--- a/.github/workflows/antsibull-build.yml
+++ b/.github/workflows/antsibull-build.yml
@@ -59,10 +59,10 @@ jobs:
             antsibull_fileutils_ref: main
 
     steps:
-      - name: Check out antsibull
+      - name: Check out antsibull-build
         uses: actions/checkout@v4
         with:
-          path: antsibull
+          path: antsibull-build
 
       - name: Check out dependent project antsibull-changelog
         uses: actions/checkout@v4
@@ -111,16 +111,16 @@ jobs:
       - name: "Test building a release: ${{ matrix.name }}"
         run: |
           nox -e coverage_release -- ${{ matrix.options }}
-        working-directory: antsibull
+        working-directory: antsibull-build
 
       - name: Report coverage
         run: |
           nox -v -e coverage
-        working-directory: antsibull
+        working-directory: antsibull-build
 
       - name: Upload coverage
         uses: codecov/codecov-action@v4
         with:
-          working-directory: antsibull
+          working-directory: antsibull-build
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/nox.yml b/.github/workflows/nox.yml
index 932da15c..5ab11982 100644
--- a/.github/workflows/nox.yml
+++ b/.github/workflows/nox.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: antsibull
+        working-directory: antsibull-build
     strategy:
       fail-fast: false
       matrix:
@@ -55,10 +55,10 @@ jobs:
             packages: ""
     name: "Run nox ${{ matrix.session }} session"
     steps:
-      - name: Check out antsibull
+      - name: Check out antsibull-build
         uses: actions/checkout@v4
         with:
-          path: antsibull
+          path: antsibull-build
       - name: Check out dependent project antsibull-core
         uses: actions/checkout@v4
         with:
@@ -106,7 +106,7 @@ jobs:
         if: ${{ matrix.codecov }}
         uses: codecov/codecov-action@v4
         with:
-          working-directory: antsibull
+          working-directory: antsibull-build
           name: "${{ matrix.session }}"
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/codecov.yml b/codecov.yml
index 9d5db5b8..a01e1838 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -27,4 +27,4 @@ github_checks:
   annotations: false
 
 fixes:
-  - "antsibull/::"
+  - "antsibull_build/::"
diff --git a/noxfile.py b/noxfile.py
index 6ffe731d..9b7b564d 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -91,7 +91,7 @@ def test(session: nox.Session):
     session.run(
         "pytest",
         "--cov-branch",
-        "--cov=antsibull",
+        "--cov=antsibull_build",
         "--cov-report",
         "term-missing",
         *more_args,
@@ -102,9 +102,7 @@ def test(session: nox.Session):
 
 @contextlib.contextmanager
 def coverage_run(session: nox.Session) -> Iterator[tuple[str, dict[str, str]]]:
-    build_command = (
-        "coverage run -p --branch --source antsibull -m antsibull.cli.antsibull_build"
-    )
+    build_command = "coverage run -p --branch --source antsibull_build -m antsibull_build.cli.antsibull_build"
     tmp = Path(session.create_tmp())
     covfile = tmp / ".coverage"
     cov_env = {"COVERAGE_FILE": f"{covfile}", **session.env}
@@ -193,8 +191,8 @@ def formatters(session: nox.Session):
 @nox.session
 def codeqa(session: nox.Session):
     install(session, ".[codeqa]", *other_antsibull(), editable=True)
-    session.run("flake8", "src/antsibull", *session.posargs)
-    session.run("pylint", "--rcfile", ".pylintrc.automated", "src/antsibull")
+    session.run("flake8", "src/antsibull_build", *session.posargs)
+    session.run("pylint", "--rcfile", ".pylintrc.automated", "src/antsibull_build")
     session.run("reuse", "lint")
     session.run("antsibull-changelog", "lint")
 
@@ -203,7 +201,7 @@ def codeqa(session: nox.Session):
 def typing(session: nox.Session):
     others = other_antsibull()
     install(session, ".[typing]", *others)
-    session.run("mypy", "src/antsibull")
+    session.run("mypy", "src/antsibull_build")
 
 
 @nox.session
@@ -252,7 +250,7 @@ def check_package_files(
             "run",
             "-p",
             "--branch",
-            "--source=antsibull",
+            "--source=antsibull_build",
             "tests/verify_package_files.py",
             "check",
             f"--data-dir={build_data / major}",
@@ -332,7 +330,11 @@ def bump(session: nox.Session):
         with open(fragment_file, "w") as fp:
             fp.write(fragment)
         session.run(
-            "git", "add", "src/antsibull/__init__.py", str(fragment_file), external=True
+            "git",
+            "add",
+            "src/antsibull_build/__init__.py",
+            str(fragment_file),
+            external=True,
         )
         session.run("git", "commit", "-m", f"Prepare {version}.", external=True)
     session.run("antsibull-changelog", "release")
@@ -345,7 +347,7 @@ def bump(session: nox.Session):
         "changelogs/fragments/",
         # src/antsibull/__init__.py is not committed in the last step
         # when the release_summary fragment is created manually
-        "src/antsibull/__init__.py",
+        "src/antsibull_build/__init__.py",
         external=True,
     )
     install(session, ".")  # Smoke test
@@ -371,7 +373,7 @@ def publish(session: nox.Session):
     install(session, "hatch")
     session.run("hatch", "publish", *session.posargs)
     session.run("hatch", "version", "post")
-    session.run("git", "add", "src/antsibull/__init__.py", external=True)
+    session.run("git", "add", "src/antsibull_build/__init__.py", external=True)
     session.run("git", "commit", "-m", "Post-release version bump.", external=True)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 21b67a2f..16a87b05 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,7 +67,7 @@ email = "maxwell@gtmx.me"
 "Changelog" = "https://github.com/ansible-community/antsibull-build/tree/main/CHANGELOG.md"
 
 [project.scripts]
-antsibull-build = "antsibull.cli.antsibull_build:main"
+antsibull-build = "antsibull_build.cli.antsibull_build:main"
 
 [project.optional-dependencies]
 # User-facing extras
@@ -118,10 +118,10 @@ dev = [
 ]
 
 [tool.hatch.version]
-path = "src/antsibull/__init__.py"
+path = "src/antsibull_build/__init__.py"
 
 [tool.hatch.build.targets.wheel]
-packages = ["src/antsibull"]
+packages = ["src/antsibull_build"]
 
 [tool.isort]
 profile = "black"
diff --git a/src/antsibull/__init__.py b/src/antsibull_build/__init__.py
similarity index 100%
rename from src/antsibull/__init__.py
rename to src/antsibull_build/__init__.py
diff --git a/src/antsibull/_vendor/__init__.py b/src/antsibull_build/_vendor/__init__.py
similarity index 100%
rename from src/antsibull/_vendor/__init__.py
rename to src/antsibull_build/_vendor/__init__.py
diff --git a/src/antsibull/_vendor/shutil.py b/src/antsibull_build/_vendor/shutil.py
similarity index 100%
rename from src/antsibull/_vendor/shutil.py
rename to src/antsibull_build/_vendor/shutil.py
diff --git a/src/antsibull/announcements.py b/src/antsibull_build/announcements.py
similarity index 98%
rename from src/antsibull/announcements.py
rename to src/antsibull_build/announcements.py
index 1af7c4ed..efd9365a 100644
--- a/src/antsibull/announcements.py
+++ b/src/antsibull_build/announcements.py
@@ -30,8 +30,8 @@
 from packaging.version import Version as PypiVer
 from typing_extensions import TypedDict
 
-from antsibull.constants import ANSIBLE_FORUM_URL, BUILD_DATA_URL
-from antsibull.pypi import PyPIClient, SdistAndWheelPair, UrlInfo
+from antsibull_build.constants import ANSIBLE_FORUM_URL, BUILD_DATA_URL
+from antsibull_build.pypi import PyPIClient, SdistAndWheelPair, UrlInfo
 
 try:
     import pyperclip  # type: ignore[import]
diff --git a/src/antsibull/build_ansible_commands.py b/src/antsibull_build/build_ansible_commands.py
similarity index 99%
rename from src/antsibull/build_ansible_commands.py
rename to src/antsibull_build/build_ansible_commands.py
index 77e45cd8..2f53b4d1 100644
--- a/src/antsibull/build_ansible_commands.py
+++ b/src/antsibull_build/build_ansible_commands.py
@@ -31,8 +31,8 @@
 from semantic_version import SimpleSpec as SemVerSpec
 from semantic_version import Version as SemVer
 
-from antsibull.constants import MINIMUM_ANSIBLE_VERSIONS
-from antsibull.python_metadata import BuildMetaMaker, LegacyBuildMetaMaker
+from antsibull_build.constants import MINIMUM_ANSIBLE_VERSIONS
+from antsibull_build.python_metadata import BuildMetaMaker, LegacyBuildMetaMaker
 
 from . import __version__ as antsibull_version
 from .build_changelog import ReleaseNotes
diff --git a/src/antsibull/build_changelog.py b/src/antsibull_build/build_changelog.py
similarity index 100%
rename from src/antsibull/build_changelog.py
rename to src/antsibull_build/build_changelog.py
diff --git a/src/antsibull/build_data_lint.py b/src/antsibull_build/build_data_lint.py
similarity index 100%
rename from src/antsibull/build_data_lint.py
rename to src/antsibull_build/build_data_lint.py
diff --git a/src/antsibull/changelog.py b/src/antsibull_build/changelog.py
similarity index 100%
rename from src/antsibull/changelog.py
rename to src/antsibull_build/changelog.py
diff --git a/src/antsibull/cli/__init__.py b/src/antsibull_build/cli/__init__.py
similarity index 100%
rename from src/antsibull/cli/__init__.py
rename to src/antsibull_build/cli/__init__.py
diff --git a/src/antsibull/cli/antsibull_build.py b/src/antsibull_build/cli/antsibull_build.py
similarity index 99%
rename from src/antsibull/cli/antsibull_build.py
rename to src/antsibull_build/cli/antsibull_build.py
index 7633c34f..9947b85b 100644
--- a/src/antsibull/cli/antsibull_build.py
+++ b/src/antsibull_build/cli/antsibull_build.py
@@ -422,7 +422,8 @@ def parse_args(program_name: str, args: list[str]) -> argparse.Namespace:
     )
 
     # Delay import to avoid potential import loops
-    from antsibull import __version__ as _ver  # pylint: disable=import-outside-toplevel
+    # pylint: disable-next=import-outside-toplevel
+    from antsibull_build import __version__ as _ver
 
     parser = get_toplevel_parser(
         prog=program_name,
diff --git a/src/antsibull/constants.py b/src/antsibull_build/constants.py
similarity index 100%
rename from src/antsibull/constants.py
rename to src/antsibull_build/constants.py
diff --git a/src/antsibull/data/README_md.txt b/src/antsibull_build/data/README_md.txt
similarity index 100%
rename from src/antsibull/data/README_md.txt
rename to src/antsibull_build/data/README_md.txt
diff --git a/src/antsibull/data/README_md.txt.license b/src/antsibull_build/data/README_md.txt.license
similarity index 100%
rename from src/antsibull/data/README_md.txt.license
rename to src/antsibull_build/data/README_md.txt.license
diff --git a/src/antsibull/data/__init__.py b/src/antsibull_build/data/__init__.py
similarity index 100%
rename from src/antsibull/data/__init__.py
rename to src/antsibull_build/data/__init__.py
diff --git a/src/antsibull/data/ansible-community.py.j2 b/src/antsibull_build/data/ansible-community.py.j2
similarity index 100%
rename from src/antsibull/data/ansible-community.py.j2
rename to src/antsibull_build/data/ansible-community.py.j2
diff --git a/src/antsibull/data/ansible-forum-announcement.j2 b/src/antsibull_build/data/ansible-forum-announcement.j2
similarity index 100%
rename from src/antsibull/data/ansible-forum-announcement.j2
rename to src/antsibull_build/data/ansible-forum-announcement.j2
diff --git a/src/antsibull/data/ansible-matrix-announcement.j2 b/src/antsibull_build/data/ansible-matrix-announcement.j2
similarity index 100%
rename from src/antsibull/data/ansible-matrix-announcement.j2
rename to src/antsibull_build/data/ansible-matrix-announcement.j2
diff --git a/src/antsibull/data/ansible-readme.rst b/src/antsibull_build/data/ansible-readme.rst
similarity index 100%
rename from src/antsibull/data/ansible-readme.rst
rename to src/antsibull_build/data/ansible-readme.rst
diff --git a/src/antsibull/data/ansible-release_py.j2 b/src/antsibull_build/data/ansible-release_py.j2
similarity index 100%
rename from src/antsibull/data/ansible-release_py.j2
rename to src/antsibull_build/data/ansible-release_py.j2
diff --git a/src/antsibull/data/ansible-setup_py.j2 b/src/antsibull_build/data/ansible-setup_py.j2
similarity index 100%
rename from src/antsibull/data/ansible-setup_py.j2
rename to src/antsibull_build/data/ansible-setup_py.j2
diff --git a/src/antsibull/data/ansible-stub-setup.py b/src/antsibull_build/data/ansible-stub-setup.py
similarity index 100%
rename from src/antsibull/data/ansible-stub-setup.py
rename to src/antsibull_build/data/ansible-stub-setup.py
diff --git a/src/antsibull/data/build-ansible.sh.j2 b/src/antsibull_build/data/build-ansible.sh.j2
similarity index 100%
rename from src/antsibull/data/build-ansible.sh.j2
rename to src/antsibull_build/data/build-ansible.sh.j2
diff --git a/src/antsibull/data/collection-readme.j2 b/src/antsibull_build/data/collection-readme.j2
similarity index 100%
rename from src/antsibull/data/collection-readme.j2
rename to src/antsibull_build/data/collection-readme.j2
diff --git a/src/antsibull/data/collection-setup_py.j2 b/src/antsibull_build/data/collection-setup_py.j2
similarity index 100%
rename from src/antsibull/data/collection-setup_py.j2
rename to src/antsibull_build/data/collection-setup_py.j2
diff --git a/src/antsibull/data/debian/changelog.j2 b/src/antsibull_build/data/debian/changelog.j2
similarity index 100%
rename from src/antsibull/data/debian/changelog.j2
rename to src/antsibull_build/data/debian/changelog.j2
diff --git a/src/antsibull/data/debian/control.j2 b/src/antsibull_build/data/debian/control.j2
similarity index 100%
rename from src/antsibull/data/debian/control.j2
rename to src/antsibull_build/data/debian/control.j2
diff --git a/src/antsibull/data/debian/copyright b/src/antsibull_build/data/debian/copyright
similarity index 100%
rename from src/antsibull/data/debian/copyright
rename to src/antsibull_build/data/debian/copyright
diff --git a/src/antsibull/data/debian/copyright.license b/src/antsibull_build/data/debian/copyright.license
similarity index 100%
rename from src/antsibull/data/debian/copyright.license
rename to src/antsibull_build/data/debian/copyright.license
diff --git a/src/antsibull/data/debian/rules b/src/antsibull_build/data/debian/rules
similarity index 100%
rename from src/antsibull/data/debian/rules
rename to src/antsibull_build/data/debian/rules
diff --git a/src/antsibull/data/debian/rules.license b/src/antsibull_build/data/debian/rules.license
similarity index 100%
rename from src/antsibull/data/debian/rules.license
rename to src/antsibull_build/data/debian/rules.license
diff --git a/src/antsibull/data/galaxy_yml.j2 b/src/antsibull_build/data/galaxy_yml.j2
similarity index 100%
rename from src/antsibull/data/galaxy_yml.j2
rename to src/antsibull_build/data/galaxy_yml.j2
diff --git a/src/antsibull/data/gplv3.txt b/src/antsibull_build/data/gplv3.txt
similarity index 100%
rename from src/antsibull/data/gplv3.txt
rename to src/antsibull_build/data/gplv3.txt
diff --git a/src/antsibull/data/gplv3.txt.license b/src/antsibull_build/data/gplv3.txt.license
similarity index 100%
rename from src/antsibull/data/gplv3.txt.license
rename to src/antsibull_build/data/gplv3.txt.license
diff --git a/src/antsibull/data/pyproject.toml b/src/antsibull_build/data/pyproject.toml
similarity index 100%
rename from src/antsibull/data/pyproject.toml
rename to src/antsibull_build/data/pyproject.toml
diff --git a/src/antsibull/dep_closure.py b/src/antsibull_build/dep_closure.py
similarity index 100%
rename from src/antsibull/dep_closure.py
rename to src/antsibull_build/dep_closure.py
diff --git a/src/antsibull/from_source/__init__.py b/src/antsibull_build/from_source/__init__.py
similarity index 100%
rename from src/antsibull/from_source/__init__.py
rename to src/antsibull_build/from_source/__init__.py
diff --git a/src/antsibull/from_source/_utils.py b/src/antsibull_build/from_source/_utils.py
similarity index 91%
rename from src/antsibull/from_source/_utils.py
rename to src/antsibull_build/from_source/_utils.py
index f332d370..a48d1af6 100644
--- a/src/antsibull/from_source/_utils.py
+++ b/src/antsibull_build/from_source/_utils.py
@@ -15,8 +15,8 @@
 
 from semantic_version import Version as SemVer
 
-from antsibull.tagging import CollectionTagData
-from antsibull.types import CollectionName
+from antsibull_build.tagging import CollectionTagData
+from antsibull_build.types import CollectionName
 
 
 def filter_tag_data(
diff --git a/src/antsibull/from_source/clone.py b/src/antsibull_build/from_source/clone.py
similarity index 95%
rename from src/antsibull/from_source/clone.py
rename to src/antsibull_build/from_source/clone.py
index f399f03d..fbfb3dbc 100644
--- a/src/antsibull/from_source/clone.py
+++ b/src/antsibull_build/from_source/clone.py
@@ -20,9 +20,9 @@
 from antsibull_core.subprocess_util import async_log_run
 from antsibull_fileutils.yaml import load_yaml_file, store_yaml_file
 
-from antsibull.tagging import CollectionTagData
-from antsibull.types import CollectionName
-from antsibull.utils.paths import copytree_and_symlinks
+from antsibull_build.tagging import CollectionTagData
+from antsibull_build.types import CollectionName
+from antsibull_build.utils.paths import copytree_and_symlinks
 
 from .exceptions import CloneError
 from .verify import FileError, FileErrorOutput
@@ -45,7 +45,7 @@ async def clone_collection(
 
     Args:
         tag_data:
-            A tag dictionary. See `antsibull.tagging.get_collections_tags()`.
+            A tag dictionary. See `antsibull_build.tagging.get_collections_tags()`.
     Returns:
         The path to the collection checkout
     """
@@ -156,7 +156,7 @@ async def normalize_clone(
         expected_collection:
             Expected NAMESPACE.NAME of the collection
         tag_data:
-            A tag dictionary. See `antsibull.tagging.get_collections_tags()`.
+            A tag dictionary. See `antsibull_build.tagging.get_collections_tags()`.
     """
     flog = mlog.fields(func="normalize_clone", collection=collection)
     errors: list[FileErrorOutput] = []
diff --git a/src/antsibull/from_source/commands.py b/src/antsibull_build/from_source/commands.py
similarity index 95%
rename from src/antsibull/from_source/commands.py
rename to src/antsibull_build/from_source/commands.py
index d826c2fe..b5e2b6b8 100644
--- a/src/antsibull/from_source/commands.py
+++ b/src/antsibull_build/from_source/commands.py
@@ -20,11 +20,11 @@
 from antsibull_core.subprocess_util import async_log_run
 from antsibull_fileutils.yaml import load_yaml_file, store_yaml_file
 
-from antsibull.build_ansible_commands import download_collections
-from antsibull.tagging import CollectionTagData
-from antsibull.types import CollectionName, make_collection_mapping
-from antsibull.utils.galaxy import create_galaxy_context
-from antsibull.utils.paths import atemp_or_dir
+from antsibull_build.build_ansible_commands import download_collections
+from antsibull_build.tagging import CollectionTagData
+from antsibull_build.types import CollectionName, make_collection_mapping
+from antsibull_build.utils.galaxy import create_galaxy_context
+from antsibull_build.utils.paths import atemp_or_dir
 
 from ._utils import filter_tag_data, tag_data_as_version_mapping
 from .clone import NormalizedCheckout, clone_collection, normalize_clone
diff --git a/src/antsibull/from_source/exceptions.py b/src/antsibull_build/from_source/exceptions.py
similarity index 100%
rename from src/antsibull/from_source/exceptions.py
rename to src/antsibull_build/from_source/exceptions.py
diff --git a/src/antsibull/from_source/verify.py b/src/antsibull_build/from_source/verify.py
similarity index 98%
rename from src/antsibull/from_source/verify.py
rename to src/antsibull_build/from_source/verify.py
index 3b735a01..00f6dca2 100644
--- a/src/antsibull/from_source/verify.py
+++ b/src/antsibull_build/from_source/verify.py
@@ -18,7 +18,7 @@
 from antsibull_core import app_context
 from antsibull_fileutils.hashing import verify_hash
 
-from antsibull.types import add_yaml_type
+from antsibull_build.types import add_yaml_type
 
 if TYPE_CHECKING:
     from typing_extensions import NotRequired
diff --git a/src/antsibull/new_ansible.py b/src/antsibull_build/new_ansible.py
similarity index 100%
rename from src/antsibull/new_ansible.py
rename to src/antsibull_build/new_ansible.py
diff --git a/src/antsibull/py.typed b/src/antsibull_build/py.typed
similarity index 100%
rename from src/antsibull/py.typed
rename to src/antsibull_build/py.typed
diff --git a/src/antsibull/pypi.py b/src/antsibull_build/pypi.py
similarity index 100%
rename from src/antsibull/pypi.py
rename to src/antsibull_build/pypi.py
diff --git a/src/antsibull/python_metadata.py b/src/antsibull_build/python_metadata.py
similarity index 100%
rename from src/antsibull/python_metadata.py
rename to src/antsibull_build/python_metadata.py
diff --git a/src/antsibull/sanity_tests.py b/src/antsibull_build/sanity_tests.py
similarity index 98%
rename from src/antsibull/sanity_tests.py
rename to src/antsibull_build/sanity_tests.py
index 020eda71..84121e1c 100644
--- a/src/antsibull/sanity_tests.py
+++ b/src/antsibull_build/sanity_tests.py
@@ -28,8 +28,8 @@
 from antsibull_fileutils.yaml import store_yaml_file
 from packaging.version import Version
 
-from antsibull.constants import SANITY_TESTS_BANNED_IGNORES, SANITY_TESTS_DEFAULT
-from antsibull.types import CollectionName, add_dataclass_yaml_type
+from antsibull_build.constants import SANITY_TESTS_BANNED_IGNORES, SANITY_TESTS_DEFAULT
+from antsibull_build.types import CollectionName, add_dataclass_yaml_type
 
 if TYPE_CHECKING:
     from _typeshed import StrPath
diff --git a/src/antsibull/tagging.py b/src/antsibull_build/tagging.py
similarity index 100%
rename from src/antsibull/tagging.py
rename to src/antsibull_build/tagging.py
diff --git a/src/antsibull/types.py b/src/antsibull_build/types.py
similarity index 100%
rename from src/antsibull/types.py
rename to src/antsibull_build/types.py
diff --git a/src/antsibull/utils/__init__.py b/src/antsibull_build/utils/__init__.py
similarity index 100%
rename from src/antsibull/utils/__init__.py
rename to src/antsibull_build/utils/__init__.py
diff --git a/src/antsibull/utils/galaxy.py b/src/antsibull_build/utils/galaxy.py
similarity index 100%
rename from src/antsibull/utils/galaxy.py
rename to src/antsibull_build/utils/galaxy.py
diff --git a/src/antsibull/utils/get_pkg_data.py b/src/antsibull_build/utils/get_pkg_data.py
similarity index 100%
rename from src/antsibull/utils/get_pkg_data.py
rename to src/antsibull_build/utils/get_pkg_data.py
diff --git a/src/antsibull/utils/paths.py b/src/antsibull_build/utils/paths.py
similarity index 95%
rename from src/antsibull/utils/paths.py
rename to src/antsibull_build/utils/paths.py
index 83ad9062..85b5c2aa 100644
--- a/src/antsibull/utils/paths.py
+++ b/src/antsibull_build/utils/paths.py
@@ -18,7 +18,7 @@
 import aiofiles.ospath
 import aiofiles.tempfile
 
-from antsibull._vendor.shutil import copytree_and_symlinks
+from antsibull_build._vendor.shutil import copytree_and_symlinks
 
 if TYPE_CHECKING:
     from _typeshed import StrPath
diff --git a/src/antsibull/versions.py b/src/antsibull_build/versions.py
similarity index 100%
rename from src/antsibull/versions.py
rename to src/antsibull_build/versions.py
diff --git a/tests/test_announcements.py b/tests/test_announcements.py
index 291e1580..0cdf9290 100644
--- a/tests/test_announcements.py
+++ b/tests/test_announcements.py
@@ -12,7 +12,7 @@
 
 import pytest
 
-from antsibull.cli.antsibull_build import run
+from antsibull_build.cli.antsibull_build import run
 
 ANNOUNCEMENT_TESTS = [
     ("7.0.0b1", "announce-7.0.0b1"),
diff --git a/tests/test_dummy.py b/tests/test_dummy.py
index 6bc94b1a..9a95c769 100644
--- a/tests/test_dummy.py
+++ b/tests/test_dummy.py
@@ -5,7 +5,7 @@
 # This file is here so that pytest won't complain that it cannot find tests.
 # Remove once we have actual tests.
 
-import antsibull
+import antsibull_build
 
 
 def test_dummy():
diff --git a/tests/test_paths.py b/tests/test_paths.py
index edb65ca4..76c75dc0 100644
--- a/tests/test_paths.py
+++ b/tests/test_paths.py
@@ -12,8 +12,8 @@
 
 import pytest
 
-from antsibull._vendor.shutil import _should_symlink
-from antsibull.utils.paths import atemp_or_dir, copytree_and_symlinks, temp_or_dir
+from antsibull_build._vendor.shutil import _should_symlink
+from antsibull_build.utils.paths import atemp_or_dir, copytree_and_symlinks, temp_or_dir
 
 
 @pytest.mark.asyncio
diff --git a/tests/test_tagging.py b/tests/test_tagging.py
index 7fdf9422..24ce6e42 100644
--- a/tests/test_tagging.py
+++ b/tests/test_tagging.py
@@ -9,7 +9,7 @@
 import pytest
 from antsibull_core.yaml import load_yaml_file
 
-from antsibull.cli.antsibull_build import run
+from antsibull_build.cli.antsibull_build import run
 
 
 @pytest.mark.parametrize(
@@ -213,7 +213,9 @@ def test_validate_tags(test_data_path: Path, tmp_path: Path):
     expected_data_path = test_data_path / name
     expected_data = load_yaml_file(expected_data_path)
     output_data_path = tmp_path / name
-    with patch("antsibull.tagging.get_collections_tags", return_value=expected_data):
+    with patch(
+        "antsibull_build.tagging.get_collections_tags", return_value=expected_data
+    ):
         ran = run(
             [
                 "antsibull-build",
diff --git a/tests/test_types.py b/tests/test_types.py
index 9bd471e2..048adfc6 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -8,7 +8,7 @@
 
 import pytest
 
-from antsibull.types import CollectionName, make_collection_mapping
+from antsibull_build.types import CollectionName, make_collection_mapping
 
 
 def test_collection_name() -> None:
diff --git a/tests/test_versions.py b/tests/test_versions.py
index 539d10f2..df6a6b84 100644
--- a/tests/test_versions.py
+++ b/tests/test_versions.py
@@ -5,7 +5,7 @@
 
 import pytest
 
-from antsibull.build_ansible_commands import feature_freeze_version
+from antsibull_build.build_ansible_commands import feature_freeze_version
 
 
 @pytest.mark.parametrize(
diff --git a/tests/verify_package_files.py b/tests/verify_package_files.py
index b4660b53..4d2971b8 100644
--- a/tests/verify_package_files.py
+++ b/tests/verify_package_files.py
@@ -24,10 +24,10 @@
 import aiohttp
 from packaging.version import Version as PypiVer
 
-import antsibull.build_ansible_commands
-from antsibull.cli import antsibull_build
-from antsibull.constants import MINIMUM_ANSIBLE_VERSIONS
-from antsibull.utils.paths import temp_or_dir
+import antsibull_build.build_ansible_commands
+from antsibull_build.cli import antsibull_build
+from antsibull_build.constants import MINIMUM_ANSIBLE_VERSIONS
+from antsibull_build.utils.paths import temp_or_dir
 
 HERE = Path(__file__).resolve().parent
 ROOT = HERE.parent
@@ -161,7 +161,7 @@ def generate_package_files(
         cm,
         cm2,
         patch_object(
-            antsibull.build_ansible_commands,
+            antsibull_build.build_ansible_commands,
             "antsibull_version",
             PLACEHOLDER_ANTSIBULL_VERSION,
         ),