diff --git a/.github/workflows/ci-copier.yml b/.github/workflows/ci-copier.yml
index 1362a6b..6e4c9a0 100644
--- a/.github/workflows/ci-copier.yml
+++ b/.github/workflows/ci-copier.yml
@@ -80,6 +80,10 @@ jobs:
           yq eval '.on = ["push"]' -i .github/workflows/build.yml
           git add .github/workflows/ci.yml .github/workflows/build.yml
           git commit -m "Replace actions trigger with on: [push]"
+          # create pixi.lock
+          pixi list --manifest-path pixi.toml --color=always
+          git add pixi.lock
+          git commit -m "Create pixi.lock"
           # Push the generated package's HEAD commit to a `ci/*` branch
           cid=$(git rev-parse HEAD)
           git push -f "${GITHUB_SERVER_URL/https:\/\//git@}:$GITHUB_REPOSITORY" $cid:refs/heads/ci/${GITHUB_SHA}-${{ matrix.minimal-python-version }}
diff --git a/template/.github/workflows/build.yml b/template/.github/workflows/build.yml
index aaf4b69..fe7d7ea 100644
--- a/template/.github/workflows/build.yml
+++ b/template/.github/workflows/build.yml
@@ -20,6 +20,8 @@ jobs:
           environments: build
       - name: Build project
         run: pixi run -e build build-wheel
+      - name: Check package
+        run: pixi run -e build check-wheel
       - name: Upload package
         uses: actions/upload-artifact@v4
         with:
diff --git a/template/pixi.toml.jinja b/template/pixi.toml.jinja
index a27fa78..23e1ebd 100644
--- a/template/pixi.toml.jinja
+++ b/template/pixi.toml.jinja
@@ -23,9 +23,11 @@ test = "pytest"
 test-coverage = "pytest --cov={{ project_slug_snake_case }} --cov-report=xml --cov-report=term-missing"
 
 [feature.build.dependencies]
-build = "*"
+python-build = "*"
+twine = "*"
 [feature.build.tasks]
 build-wheel = "python -m build --no-isolation ."
+check-wheel = "twine check dist/*"
 
 [feature.lint.dependencies]
 pre-commit = "*"