Install build wrapper action - bash not found

[elliott-bfs]

I'm using a Windows runner and attempting to integrate the build-wrapper script into my build (Microchip MPLAB X project, using XC8 compiler which is based on clang). However, the windows runner I have set up apparently does not have bash installed on it.

Output of SonarSource/sonarqube-scan-action/install-build-wrapper action:

Run SonarSource/sonarqube-scan-action/install-build-wrapper@v4
  env:
    GH_TOKEN: ***
    SONAR_HOST_URL: ***
Run ${GITHUB_ACTION_PATH}/../scripts/configure_paths.sh >> $GITHUB_OUTPUT
  ${GITHUB_ACTION_PATH}/../scripts/configure_paths.sh >> $GITHUB_OUTPUT
  Error: bash: command not found

Sanitized workflow file:

name: PROJECT
on: 
  push:
  pull_request:
    types: [opened, synchronize, reopened]

env:
  GH_TOKEN: ${{ secrets.ACTIONS_TOKEN }}

jobs:
  checkout:
    runs-on: [self-hosted, windows, project-runner]
    steps:
    - name: checkout
      uses: actions/checkout@v4
      with:
        submodules: recursive
        token: ${{ secrets.ACTIONS_TOKEN }}
  
  build:
    if: always()
    needs: [checkout]
    runs-on: [self-hosted, windows, project-runner]
    steps:
    - name: Install Build Wrapper
      uses: SonarSource/sonarqube-scan-action/install-build-wrapper@v4
      env:
        SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
    - name: Clean Build
      run: |
        cd PROJECT.X
        build-wrapper-win-x86-64.exe --out-dir ../build/sonarqube/wrapper make clean all

  code-analysis:
    needs: [build]
    runs-on: [self-hosted, windows, project-runner]
    steps:
    - name: SonarQube Scan
      uses: sonarsource/sonarqube-scan-action@v4
      env:
        SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
        SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}

Is bash a hard requirement? I may or may not be able to install it on the runner.