diff --git a/.bazelversion b/.bazelversion
new file mode 100644
index 0000000..643916c
--- /dev/null
+++ b/.bazelversion
@@ -0,0 +1 @@
+7.3.1
diff --git a/.github/workflows/licence-checker.yml b/.github/workflows/licence-checker.yml
index f9a9f6f..a32433d 100644
--- a/.github/workflows/licence-checker.yml
+++ b/.github/workflows/licence-checker.yml
@@ -22,9 +22,9 @@ jobs:
       with:
         python-version: 3.9
     - name: Check formatting with Ruff
-      run: bazel run :format.check
+      run: bazel run //quality:format.check
     - name: Run Licence Checker
-      run: bazel run //:licence-check
+      run: bazel run //quality:licence-check
     - name: Test Licence Checker
       run: |
         cd tests
diff --git a/BUILD b/BUILD
index 865bf5d..9f9e5f5 100644
--- a/BUILD
+++ b/BUILD
@@ -1,31 +1,3 @@
 # Copyright lowRISC contributors.
 # Licensed under the Apache License, Version 2.0, see LICENSE for details.
 # SPDX-License-Identifier: Apache-2.0
-
-load("//rules:rules.bzl", "licence_check")
-load("@aspect_rules_lint//format:defs.bzl", "format_multirun")
-
-licence_check(
-    name = "licence-check",
-    exclude_patterns = [".style.yapf"],
-    licence = """
-    Copyright lowRISC contributors.
-    Licensed under the Apache License, Version 2.0, see LICENSE for details.
-    SPDX-License-Identifier: Apache-2.0
-    """,
-)
-
-alias(
-    name = "ruff",
-    actual = select({
-        "@bazel_tools//src/conditions:linux_x86_64": "@ruff_x86_64-unknown-linux-gnu//:ruff",
-        "@bazel_tools//src/conditions:linux_aarch64": "@ruff_aarch64-unknown-linux-gnu//:ruff",
-        "@bazel_tools//src/conditions:darwin_arm64": "@ruff_aarch64-apple-darwin//:ruff",
-        "@bazel_tools//src/conditions:darwin_x86_64": "@ruff_x86_64-apple-darwin//:ruff",
-    }),
-)
-
-format_multirun(
-    name = "format",
-    python = ":ruff",
-)
diff --git a/quality/BUILD b/quality/BUILD
new file mode 100644
index 0000000..0509fcd
--- /dev/null
+++ b/quality/BUILD
@@ -0,0 +1,33 @@
+# Copyright lowRISC contributors.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+
+load("//rules:rules.bzl", "licence_check")
+load("@aspect_rules_lint//format:defs.bzl", "format_multirun")
+
+package(default_visibility = ["//visibility:private"])
+
+licence_check(
+    name = "licence-check",
+    exclude_patterns = [".style.yapf"],
+    licence = """
+    Copyright lowRISC contributors.
+    Licensed under the Apache License, Version 2.0, see LICENSE for details.
+    SPDX-License-Identifier: Apache-2.0
+    """,
+)
+
+alias(
+    name = "ruff",
+    actual = select({
+        "@bazel_tools//src/conditions:linux_x86_64": "@ruff_x86_64-unknown-linux-gnu//:ruff",
+        "@bazel_tools//src/conditions:linux_aarch64": "@ruff_aarch64-unknown-linux-gnu//:ruff",
+        "@bazel_tools//src/conditions:darwin_arm64": "@ruff_aarch64-apple-darwin//:ruff",
+        "@bazel_tools//src/conditions:darwin_x86_64": "@ruff_x86_64-apple-darwin//:ruff",
+    }),
+)
+
+format_multirun(
+    name = "format",
+    python = ":ruff",
+)