Seems I have to use real paths?

.woodpecker.yml

@@ -2,8 +2,8 @@ steps:
   - name: sanity-check
     image: alpine
     volumes:
-      - /obsidian:/obsidian
-      - /backup:/backup
+      - "/Users/jthor/Obsidian/My Vault:/obsidian"
+      - "/Volumes/What/backup:/backup"
     commands:
       - echo "Listing mount points..."
       - ls -ld /obsidian /backup
@@ -12,8 +12,8 @@ steps:
   - name: backup-on-push
     image: alpine
     volumes:
-      - /obsidian:/obsidian
-      - /backup:/backup
+      - "/Users/jthor/Obsidian/My Vault:/obsidian"
+      - "/Volumes/What/backup:/backup"
     commands:
       - tar czf /backup/obsidian-$(date +%F).tar.gz /obsidian
     when:
@@ -22,8 +22,8 @@ steps:
   - name: backup-on-cron
     image: alpine
     volumes:
-      - /obsidian:/obsidian
-      - /backup:/backup
+      - "/Users/jthor/Obsidian/My Vault:/obsidian"
+      - "/Volumes/What/backup:/backup"
     commands:
       - tar czf /backup/obsidian-$(date +%F).tar.gz /obsidian
     when: