This is my installation error: Building extension modules Traceback (most recent call last): File "setup.py", line 8, in <module> import petsc4py ImportError: No module named 'petsc4py' Linting firedrake codebase Linting firedrake test suite Linting firedrake scripts Running all regression tests Traceback (most recent call last): File "/usr/lib/python3.5/runpy.py", line 193, in _run_module_as_main "__main__", mod_spec) File "/usr/lib/python3.5/runpy.py", line 85, in _run_code exec(code, run_globals) File "/home/emmanuel/firedrake/lib/python3.5/site-packages/pytest.py", line 7, in <module> from _pytest.assertion import register_assert_rewrite File "/home/emmanuel/firedrake/lib/python3.5/site-packages/_pytest/assertion/__init__.py", line 12, in <module> from _pytest.assertion import rewrite File "/home/emmanuel/firedrake/lib/python3.5/site-packages/_pytest/assertion/rewrite.py", line 24, in <module> from _pytest.pathlib import fnmatch_ex File "/home/emmanuel/firedrake/lib/python3.5/site-packages/_pytest/pathlib.py", line 26, in <module> from pathlib2 import Path, PurePath ImportError: No module named 'pathlib2' Makefile:60: recipe for target 'test' failed make: *** [test] Error 1 (firedrake) emmanuel@emmanuel:~/firedrake/src/firedrake$ (firedrake) emmanuel@emmanuel:~/firedrake/src/firedrake$ (firedrake) emmanuel@emmanuel:~/firedrake/src/firedrake$ (firedrake) emmanuel@emmanuel:~/firedrake/src/firedrake$ sudo su [sudo] senha para emmanuel: root@emmanuel:/home/emmanuel/firedrake/src/firedrake# root@emmanuel:/home/emmanuel/firedrake/src/firedrake# root@emmanuel:/home/emmanuel/firedrake/src/firedrake# root@emmanuel:/home/emmanuel/firedrake/src/firedrake# make alltest Building extension modules Traceback (most recent call last): File "setup.py", line 31, in <module> import versioneer File "/home/emmanuel/firedrake/src/firedrake/versioneer.py", line 1658 file=sys.stderr) ^ SyntaxError: invalid syntax Linting firedrake codebase /usr/bin/python: No module named flake8 Makefile:8: recipe for target 'lint' failed make: *** [lint] Error 1