Reading the Hacking Guide tells me to: --- Installing in a virtualenv Install the needed dependencies. sudo apt install build-essential python3-dev libapt-pkg-dev Install snapcraft. ./setup.py install -- While this process does complete "successfully" - the output of running snapcraft directly thereafter yields a broken snapcraft install. it initially complains about missing 'YAML', then once installed manually via pip3 install pyyaml, it complains about missing jsonschema. pip3 install jsonschema. I double backed and ran pip3 install -r requirements.txt and there's where things got interesting and fully blocked me with libsalt. The output is as follows: site-packages (from -r requirements.txt (line 7)) Requirement already satisfied (use --upgrade to upgrade): pyxdg==0.25 in /tmp/venv3/lib/python3.5/site-packages (from -r requirements.txt (line 8)) Collecting requests==2.9.1 (from -r requirements.txt (line 9)) Using cached requests-2.9.1-py2.py3-none-any.whl Collecting requests-oauthlib==0.4.0 (from -r requirements.txt (line 12)) Using cached requests-oauthlib-0.4.0.tar.gz Collecting requests-toolbelt==0.6.0 (from -r requirements.txt (line 13)) Using cached requests_toolbelt-0.6.0-py2.py3-none-any.whl Collecting responses==0.5.1 (from -r requirements.txt (line 14)) Using cached responses-0.5.1-py2.py3-none-any.whl Collecting petname==1.12 (from -r requirements.txt (line 15)) Using cached petname-1.12.tar.gz Collecting pymacaroons==0.9.2 (from -r requirements.txt (line 16)) Using cached pymacaroons-0.9.2-py2.py3-none-any.whl Collecting pymacaroons-pynacl==0.9.3 (from -r requirements.txt (line 17)) Using cached pymacaroons_pynacl-0.9.3-py2.py3-none-any.whl Collecting simplejson==3.8.2 (from -r requirements.txt (line 18)) Using cached simplejson-3.8.2.tar.gz Collecting tabulate==0.7.5 (from -r requirements.txt (line 19)) Using cached tabulate-0.7.5.tar.gz Collecting cookies (from responses==0.5.1->-r requirements.txt (line 14)) Using cached cookies-2.2.1-py2.py3-none-any.whl Requirement already satisfied (use --upgrade to upgrade): six in /tmp/venv3/lib/python3.5/site-packages (from responses==0.5.1->-r requirements.txt (line 14)) Collecting libnacl<1.4,>=1.3.6 (from pymacaroons==0.9.2->-r requirements.txt (line 16)) Using cached libnacl-1.3.6.tar.gz Complete output from command python setup.py egg_info: Traceback (most recent call last): File "/tmp/pip-build-qb46781k/libnacl/libnacl/__init__.py", line 62, in _get_nacl return ctypes.cdll.LoadLibrary('tweetnacl.so') File "/usr/lib/python3.5/ctypes/__init__.py", line 425, in LoadLibrary return self._dlltype(name) File "/usr/lib/python3.5/ctypes/__init__.py", line 347, in __init__ self._handle = _dlopen(self._name, mode) OSError: tweetnacl.so: cannot open shared object file: No such file or directory During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<string>", line 1, in <module> File "/tmp/pip-build-qb46781k/libnacl/setup.py", line 7, in <module> from libnacl.version import __version__ File "/tmp/pip-build-qb46781k/libnacl/libnacl/__init__.py", line 70, in <module> nacl = _get_nacl() File "/tmp/pip-build-qb46781k/libnacl/libnacl/__init__.py", line 68, in _get_nacl raise OSError(msg) OSError: Could not locate nacl lib, searched for libsodium.so, libsodium.so.13, libsodium.so.10, libsodium.so.5, libsodium.so.4, and tweetnacl.so ---------------------------------------- Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-qb46781k/libnacl/ Can someone verify the virtualenv install instructions, and perhaps submit an update to whats really needed to get snapcraft working from a venv?