Reuse Workflow in github action - Azure deployment - azure

Question

I need to reuse a workflow in another workflow instead of repeating things.
The build workflow already performs pip install and I just need the installed package to be reused during the deploy workflow instead of re-running pip install
build:
runs-on: ubuntu-latest
needs: create-envfile
steps:
- uses: actions/checkout#v2
- name: Set up Python version
uses: actions/setup-python#v1
with:
python-version: '3.8'
- name: Create and start virtual environment
run: |
python -m venv venv
source venv/bin/activate
- name: Install dependencies
run: |
eval `ssh-agent -s`
cat ./.github/workflows/id_rsa | ssh-add -
pip install -r requirements.txt
- name: Upload artifact for deployment jobs
uses: actions/upload-artifact#v2
with:
name: python-app
path: |
.
!venv/
deploy:
runs-on: ubuntu-latest
needs: build
environment:
name: 'Production'
url: ${{ steps.somesecret }}
steps:
- name: Download artifact from build job
uses: actions/download-artifact#v2
with:
name: python-app
path: .
- name: 'Deploy to Azure Web App'
uses: azure/webapps-deploy#v2
id: deploy-to-webapp
with:
app-name: 'project-prod'
slot-name: 'Production'
publish-profile: ${{ secrets.somesecrethere }}
What happens here, is as long as the deploy workflow finishes downloading artifacts from build, it will restart running pip install the packages from requirements.txt, which of course a redundant. How to prevent this and reuse the already installed package instead