fix: install 'build' with pip

Author: srevinsaju

Diff for: snap/snapcraft.yaml

@@ -61,12 +61,11 @@ parts:
     after: [classic-launch, debian-multiarch-triplet-provider-launch]
     # See 'snapcraft plugins'
     build-packages:
-      - python3-build
+      - python3-pip
     override-build: |
-      python -m build .
-      tar -xvf dist/*.tar.gz setup.py
-      rm -rf dist
-      snapcraftctl build
+      pip install poetry
+      python -m poetry config --local virtualenvs.path $SNAPCRAFT_PART_INSTALL
+      python -m poetry install
     plugin: python
     source: .