diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index 33eb2b2..7d1bb5d 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -28,13 +28,12 @@ jobs:
         id: version
         shell: bash
         run: |
-          version="$(python - <<'PY'
-          import tomllib
+          version="$(awk -F '"' '/^version = / { print $2; exit }' pyproject.toml)"
 
-          with open("pyproject.toml", "rb") as f:
-              print(tomllib.load(f)["project"]["version"])
-          PY
-          )"
+          if [ -z "$version" ]; then
+            echo "Failed to read project.version from pyproject.toml."
+            exit 1
+          fi
 
           echo "version=${version}" >> "$GITHUB_OUTPUT"
           echo "image=${REGISTRY}/${IMAGE_NAME}" >> "$GITHUB_OUTPUT"