manually set home

Author: tgross35

.github/workflows/main.yaml

@@ -119,6 +119,13 @@ jobs:
     - name: Print runner information
       run: uname -a
 
+    # ppc/s390x runners don't have HOME set
+    - name: Set $HOME
+      if: matrix.os == 'ubuntu-24.04-ppc64le' || matrix.os == 'ubuntu-24.04-s390x'
+      run: |
+        set -x
+        echo "HOME=$(realpath ~)" >> "$GITHUB_ENV"
+
     # Native runners don't have rustup by default
     - name: Install rustup
       if: matrix.os == 'ubuntu-24.04-ppc64le' || matrix.os == 'ubuntu-24.04-s390x'