Array to use in matrix

Can it be possible to return an array as an input to use in a matrix ?

  build:
    strategy:
      fail-fast: true
      matrix: 
        package: {{steps.filter.outputs}} //This is not working cause is not an array but a map ?
    if: ${{ matrix.package == 'true' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: dorny/paths-filter@v2
        id: filter
        with:
          base: 'main'
          filters: |
            shared:
              - 'packages/shared/**'
            template:
              - 'packages/template/**'

Im getting a cannot unmarshal !!map into []interface {}

[tcarac]

I guess using separate job and some jq magic to get JSON array with names of changed packages does the trick for me.

[akeemjenkins]

I love this feature! This is very useful in managing terraform apply and plan where each directory maps to an AWS account and you only want to run terraform on changed directories. It also allows for writing the terraform job once with automatic job spawning. Thank you!