Mimic what is done for 6.38

Author: Olivier Couet

.github/workflows/root-ci.yml

@@ -130,7 +130,7 @@ jobs:
         env:
           OVERRIDES: ${{ join( matrix.overrides, ' ') }}
           CONFIGFILE: '.github/workflows/root-ci-config/buildconfig/${{ matrix.platform }}.txt'
-        shell: bash -leo pipefail {0}
+        shell: bash
         run: |
           set -x
 
@@ -158,6 +158,7 @@ jobs:
         run: 'echo SSL_CERT_FILE=/opt/local/share/curl/curl-ca-bundle.crt >> $GITHUB_ENV'
 
       - name: Pull Request Build
+        shell: bash -leo pipefail {0}
         if: github.event_name == 'pull_request'
         env:
           INCREMENTAL: ${{ !contains(github.event.pull_request.labels.*.name, 'clean build') }}
@@ -174,6 +175,7 @@ jobs:
                     --platform        ${{ matrix.platform }}"
 
       - name: Workflow dispatch
+        shell: bash -leo pipefail {0}
         if: ${{ github.event_name == 'workflow_dispatch' && !matrix.is_special }}
         run: ".github/workflows/root-ci-config/build_root.py
                     --buildtype      ${{ inputs.buildtype }}
@@ -185,6 +187,7 @@ jobs:
                     --repository     ${{ github.server_url }}/${{ github.repository }}"
 
       - name: Nightly build
+        shell: bash -leo pipefail {0}
         if:   github.event_name == 'schedule'
         run: ".github/workflows/root-ci-config/build_root.py
                     --buildtype      Release
@@ -195,6 +198,7 @@ jobs:
                     --repository     ${{ github.server_url }}/${{ github.repository }}"
 
       - name: Update build cache after push to release branch
+        shell: bash -leo pipefail {0}
         if:   github.event_name == 'push'
         run: ".github/workflows/root-ci-config/build_root.py
                     --buildtype      RelWithDebInfo