The snap builds for Mariner have started failing without any change to snapcraft.yml. The error is below: Sorry, an error occurred in Snapcraft: Traceback (most recent call last): File "/usr/bin/snapcraft", line 9, in <module> load_entry_point('snapcraft==2.43.1', 'console_scripts', 'snapcraft')() File "/usr/lib/python3/dist-packages/click/core.py", line 716, in __call__ return self.main(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 696, in main rv = self.invoke(ctx) File "/usr/lib/python3/dist-packages/click/core.py", line 1037, in invoke return Command.invoke(self, ctx) File "/usr/lib/python3/dist-packages/click/core.py", line 889, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/lib/python3/dist-packages/click/core.py", line 534, in invoke return callback(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/decorators.py", line 17, in new_func return f(get_current_context(), *args, **kwargs) File "/usr/lib/python3/dist-packages/snapcraft/cli/_runner.py", line 93, in run ctx.forward(lifecyclecli.commands["snap"]) File "/usr/lib/python3/dist-packages/click/core.py", line 552, in forward return self.invoke(cmd, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 534, in invoke return callback(*args, **kwargs) File "/usr/lib/python3/dist-packages/snapcraft/cli/lifecycle.py", line 136, in snap project = _execute(steps.PRIME, parts=[], **kwargs) File "/usr/lib/python3/dist-packages/snapcraft/cli/lifecycle.py", line 35, in _execute lifecycle.execute(step, project_config, parts) File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 90, in execute executor.run(step, part_names) File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 196, in run self._create_meta(step, processed_part_names) File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 359, in _create_meta self.config.validator.schema, File "/usr/lib/python3/dist-packages/snapcraft/internal/meta/_snap_packaging.py", line 109, in create_snap_packaging packaging.write_snap_yaml() File "/usr/lib/python3/dist-packages/snapcraft/internal/meta/_snap_packaging.py", line 312, in write_snap_yaml snap_yaml = self._compose_snap_yaml() File "/usr/lib/python3/dist-packages/snapcraft/internal/meta/_snap_packaging.py", line 468, in _compose_snap_yaml snap_yaml["apps"] = self._wrap_apps(self._config_data["apps"]) File "/usr/lib/python3/dist-packages/snapcraft/internal/meta/_snap_packaging.py", line 567, in _wrap_apps self._wrap_app(app, apps[app]) File "/usr/lib/python3/dist-packages/snapcraft/internal/meta/_snap_packaging.py", line 575, in _wrap_app app[k] = self._wrap_exe(app[k], "{}-{}".format(k, name)) File "/usr/lib/python3/dist-packages/snapcraft/internal/meta/_snap_packaging.py", line 546, in _wrap_exe with open(exepath, "rb") as exefile: FileNotFoundError: [Errno 2] No such file or directory: '/home/test/mariner/prime/bin/mariner' We would appreciate it if you created a bug report at https://launchpad.net/snapcraft/+filebug with the above text included. You can find the snapcraft.yaml here https://gitlab.com/radek-sprta/mariner/blob/90a6fb89c4354223ab844d5e14d77ec9f5d75db7/snapcraft.yaml. For the above test, I have used setup.py generated by poetry-setup (https://pypi.org/project/poetry-setup/). python3 setup.py bdist_wheel produces a valid package.