I have hit this a bunch of times recently on my 16.04 KDE Neon machine. It only happens if I set SNAPCRAFT_CONTAINER_BUILDS=1, run a build (which fails) and then re-run the build again. Here you can see the end of a failure, me re-running and it failing, then me doing a clean and re-running and it works. alan@KinkPad-K450:~/src/cointop$ snap version snap 2.32.1 snapd 2.32.1 series 16 neon 16.04 kernel 4.13.0-37-generic alan@KinkPad-K450:~/src/cointop$ snapcraft --version snapcraft, version 2.40+git3.b6ed5ac File "/snap/snapcraft/1337/lib/python3.6/site-packages/snapcraft/internal/pluginhandler/__init__.py", line 363, in build script_runner.run(scriptlet=self._part_properties.get('prepare')) File "/snap/snapcraft/1337/lib/python3.6/site-packages/snapcraft/internal/pluginhandler/_scriptlets.py", line 43, in run run([scriptlet_path], cwd=self._builddir) File "/snap/snapcraft/1337/lib/python3.6/site-packages/snapcraft/internal/common.py", line 64, in run subprocess.check_call(['/bin/sh', f.name] + cmd, **kwargs) File "/snap/snapcraft/1337/usr/lib/python3.6/subprocess.py", line 291, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['/bin/sh', '/tmp/tmplp53fzcu', '/tmp/tmpm286qh9h']' returned non-zero exit status 128. You can anonymously report this issue to the snapcraft developers. No other data than this traceback and the version of snapcraft in use will be sent. Would you like send this error data? [y/N]: n Stopping local:snapcraft-cointop alan@KinkPad-K450:~/src/cointop$ snapcraft Using default LXD remote because SNAPCRAFT_CONTAINER_BUILDS is set to 1 Device /root/build_cointop removed from snapcraft-cointop Waiting for a network connection... Network connection established Mounting /home/alan/src/cointop into container Device /root/build_cointop added to snapcraft-cointop cannot change profile for the next exec call: No such file or directory Stopping local:snapcraft-cointop alan@KinkPad-K450:~/src/cointop$ snapcraft clean Deleting local:snapcraft-cointop Cleaning up priming area Cleaning up staging area Cleaning up parts directory alan@KinkPad-K450:~/src/cointop$ snapcraft Using default LXD remote because SNAPCRAFT_CONTAINER_BUILDS is set to 1 Creating snapcraft-cointop Device fuse added to snapcraft-cointop Waiting for a network connection... Network connection established Hit:1 http://archive.ubuntu.com/ubuntu xenial InRelease Get:2 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB] Get:3 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB] Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB] Get:5 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [7532 kB]