add needed packages

Signed-off-by: Batuhan Apaydin <batuhan.apaydin@chainguard.dev>

pkg/build/pipelines/python/build-gpep517.yaml

@@ -3,15 +3,12 @@ name: Build a Python wheel with gpep517
 needs:
   packages:
     - busybox
+    - python3
+    - py3-gpep517
+    - py3-installer
+    - py3-wheel
 
 pipeline:
-  - runs: |
-      if ! [ -x "$(command -v python3)" ]; then
-        echo 'Error: Python is not installed.'
-        exit 1
-      fi
-
   - runs: |
       python3 -m gpep517 build-wheel --wheel-dir dist --output-fd 3 3>&1 >&2
-      python3 -m installer -d "${{targets.contextdir}}" dist/*.whl
-      find ${{targets.contextdir}} -name "*.pyc" -exec rm -rf '{}' +
+      python3 -m installer -d "${{targets.contextdir}}" dist/*.whl