How to set env vars on GitHub Actions for a Windows release?

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Background

I am trying to get a Github Action working with Windows and Bakeware because I am trying to create a release using it.

However, I am having issues with the environment variables.

Code

In Bakeware’s setup page it is mentioned that we have to set the MAKE and CC environment variables:

In my Github Action, that is exactly what I do (I think):

name: build

env:
  MIX_ENV: test
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:

  build:
    name: Build on Windows
    runs-on: windows-2019
    env: 
        CC: gcc
        MAKE: make

    steps:
    - uses: actions/checkout@v2
    - uses: erlef/setup-beam@v1
      with:
        elixir-version: '1.13.x' # Define the elixir version [required]
        otp-version: '24.2.x' # Define the OTP version [required]
    
    - name: Install choco
      shell: powershell
      run: |
        Set-ExecutionPolicy -ExecutionPolicy Bypass
        Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))

    - name: Install bakeware dependencies
      shell: powershell
      run: choco install -y zstandard make mingw

    - name: Install Dependencies
      shell: powershell
      run: mix deps.get
 
    - name: Run credo code analyser
      shell: powershell
      run: mix credo --strict

I am even using powershell to do it (even though I am not really sure if this is needed).

Problem

However my GitHub Actions code comes back with this error:

==> bakeware

mkdir "d:/a/market_manager/market_manager/_build/test/lib/bakeware/obj"

mkdir "d:/a/market_manager/market_manager/_build/test/lib/bakeware/launcher"

mkdir "d:/a/market_manager/market_manager/_build/test/lib/bakeware/obj/zstd/lib/decompress"

mkdir: cannot create directory 'd:/a/market_manager/market_manager/_build/test/lib/bakeware/obj/zstd/lib/decompress': No such file or directory

make: *** [Makefile:70: d:/a/market_manager/market_manager/_build/test/lib/bakeware/obj/zstd/lib/decompress] Error 1

could not compile dependency :bakeware, "mix compile" failed. Errors may have been logged above. You can recompile this dependency with "mix deps.compile bakeware", update it with "mix deps.update bakeware" or clean it with "mix deps.clean bakeware"

** (Mix) Could not compile with "make" (exit status: 2).

It says it cannot compile with make.

Question

I have tried copy/pasting the section:

env: 
  CC: gcc
  MAKE: make

To every section in that file I could think of, but I always end up with the same issue.

What am I doing wrong?

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