Add ability to debug packages when they fail

scale_build/packages/build.py

@@ -166,6 +166,10 @@ class BuildPackageMixin:
             build_env = f'DEB_BUILD_OPTIONS={self.deoptions} ' if self.deoptions else ''
             return [f'{build_env} debuild {" ".join(self.deflags)}']
 
+    @property
+    def debug_command(self):
+        return f'chroot {self.dpkg_overlay} /bin/bash'
+
     @property
     def deflags(self):
         return [f'-j{self.jobs if self.jobs else os.cpu_count()}', '-us', '-uc', '-b']