diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d451a05..8305335 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -140,6 +140,8 @@ repos:
           - earned-time @ git+https://github.com/kuhyx/utils@earned-time-v0.18.0#subdirectory=earned_time
           - freedays @ git+https://github.com/kuhyx/utils@freedays-v0.4.0#subdirectory=freedays
           - sickdays @ git+https://github.com/kuhyx/utils@sickdays-v0.3.0#subdirectory=sickdays
+          # Same pin as workout_app/tools/render_finish_chime.sh installs.
+          - music_theory @ git+https://github.com/kuhyx/utils@music-theory-v0.1.0#subdirectory=music_theory
           - mcp>=2,<3
           - pydantic
       - id: pylint
diff --git a/stronglift_replacement/workout_app/tools/render_finish_chime.sh b/stronglift_replacement/workout_app/tools/render_finish_chime.sh
index c876ff4..445ab99 100755
--- a/stronglift_replacement/workout_app/tools/render_finish_chime.sh
+++ b/stronglift_replacement/workout_app/tools/render_finish_chime.sh
@@ -10,7 +10,8 @@
 # Requires: python3 (with venv), network access to github.com.
 set -euo pipefail
 
-readonly TOOLS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+TOOLS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+readonly TOOLS_DIR
 readonly TOOLKIT_SPEC="music_theory @ git+https://github.com/kuhyx/utils@music-theory-v0.1.0#subdirectory=music_theory"
 readonly OUT_DIR="${1:-${TOOLS_DIR}/../assets/sounds}"
 WORK_DIR=""