python - Setup script exited with error: command 'x86_64-linux-gnu-gcc' failed with exit status 1 while Installing PyNaCl -

i'm trying install pynacl on ubuntu 16.04 , i'm getting error on title; whole traceback:

collecting pynacl   using cached pynacl-1.0.1.tar.gz     complete output command python setup.py egg_info:     package libffi not found in pkg-config search path.     perhaps should add directory containing `libffi.pc'     pkg_config_path environment variable     no package 'libffi' found     package libffi not found in pkg-config search path.     perhaps should add directory containing `libffi.pc'     pkg_config_path environment variable     no package 'libffi' found     package libffi not found in pkg-config search path.     perhaps should add directory containing `libffi.pc'     pkg_config_path environment variable     no package 'libffi' found     package libffi not found in pkg-config search path.     perhaps should add directory containing `libffi.pc'     pkg_config_path environment variable     no package 'libffi' found     package libffi not found in pkg-config search path.     perhaps should add directory containing `libffi.pc'     pkg_config_path environment variable     no package 'libffi' found     warning: build_py: byte-compiling disabled, skipping.      c/_cffi_backend.c:15:17: fatal error: ffi.h: no such file or directory     compilation terminated.     traceback (most recent call last):       file "/usr/lib/python3.5/distutils/unixccompiler.py", line 118, in _compile         extra_postargs)       file "/usr/lib/python3.5/distutils/ccompiler.py", line 909, in spawn         spawn(cmd, dry_run=self.dry_run)       file "/usr/lib/python3.5/distutils/spawn.py", line 36, in spawn         _spawn_posix(cmd, search_path, dry_run=dry_run)       file "/usr/lib/python3.5/distutils/spawn.py", line 159, in _spawn_posix         % (cmd, exit_status))     distutils.errors.distutilsexecerror: command 'x86_64-linux-gnu-gcc' failed exit status 1      during handling of above exception, exception occurred:      traceback (most recent call last):       file "/usr/lib/python3.5/distutils/core.py", line 148, in setup         dist.run_commands()       file "/usr/lib/python3.5/distutils/dist.py", line 955, in run_commands         self.run_command(cmd)       file "/usr/lib/python3.5/distutils/dist.py", line 974, in run_command         cmd_obj.run()       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/bdist_egg.py", line 161, in run         cmd = self.call_command('install_lib', warn_dir=0)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/bdist_egg.py", line 147, in call_command         self.run_command(cmdname)       file "/usr/lib/python3.5/distutils/cmd.py", line 313, in run_command         self.distribution.run_command(command)       file "/usr/lib/python3.5/distutils/dist.py", line 974, in run_command         cmd_obj.run()       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/install_lib.py", line 11, in run         self.build()       file "/usr/lib/python3.5/distutils/command/install_lib.py", line 109, in build         self.run_command('build_ext')       file "/usr/lib/python3.5/distutils/cmd.py", line 313, in run_command         self.distribution.run_command(command)       file "/usr/lib/python3.5/distutils/dist.py", line 974, in run_command         cmd_obj.run()       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/build_ext.py", line 75, in run         _build_ext.run(self)       file "/usr/lib/python3.5/distutils/command/build_ext.py", line 338, in run         self.build_extensions()       file "/usr/lib/python3.5/distutils/command/build_ext.py", line 447, in build_extensions         self._build_extensions_serial()       file "/usr/lib/python3.5/distutils/command/build_ext.py", line 472, in _build_extensions_serial         self.build_extension(ext)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/build_ext.py", line 196, in build_extension         _build_ext.build_extension(self, ext)       file "/usr/lib/python3.5/distutils/command/build_ext.py", line 532, in build_extension         depends=ext.depends)       file "/usr/lib/python3.5/distutils/ccompiler.py", line 574, in compile         self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)       file "/usr/lib/python3.5/distutils/unixccompiler.py", line 120, in _compile         raise compileerror(msg)     distutils.errors.compileerror: command 'x86_64-linux-gnu-gcc' failed exit status 1      during handling of above exception, exception occurred:      traceback (most recent call last):       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 157, in save_modules         yield saved       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 198, in setup_context         yield       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 248, in run_setup         directorysandbox(setup_dir).run(runner)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 278, in run         return func()       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 246, in runner         _execfile(setup_script, ns)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 47, in _execfile         exec(code, globals, locals)       file "/tmp/easy_install-ek_ikn33/cffi-1.8.3/setup.py", line 193, in <module>         subprocess.check_call(["make", "check"], cwd=build_temp)       file "/usr/lib/python3.5/distutils/core.py", line 163, in setup         raise systemexit("error: " + str(msg))     systemexit: error: command 'x86_64-linux-gnu-gcc' failed exit status 1      during handling of above exception, exception occurred:      traceback (most recent call last):       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 1101, in run_setup         run_setup(setup_script, args)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 251, in run_setup         raise       file "/usr/lib/python3.5/contextlib.py", line 77, in __exit__         self.gen.throw(type, value, traceback)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 198, in setup_context         yield       file "/usr/lib/python3.5/contextlib.py", line 77, in __exit__         self.gen.throw(type, value, traceback)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 169, in save_modules         saved_exc.resume()       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 144, in resume         six.reraise(type, exc, self._tb)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/pkg_resources/_vendor/six.py", line 685, in reraise         raise value.with_traceback(tb)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 157, in save_modules         yield saved       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 198, in setup_context         yield       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 248, in run_setup         directorysandbox(setup_dir).run(runner)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 278, in run         return func()       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 246, in runner         _execfile(setup_script, ns)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/sandbox.py", line 47, in _execfile         exec(code, globals, locals)       file "/tmp/easy_install-ek_ikn33/cffi-1.8.3/setup.py", line 193, in <module>         subprocess.check_call(["make", "check"], cwd=build_temp)       file "/usr/lib/python3.5/distutils/core.py", line 163, in setup         raise systemexit("error: " + str(msg))     systemexit: error: command 'x86_64-linux-gnu-gcc' failed exit status 1      during handling of above exception, exception occurred:      traceback (most recent call last):       file "<string>", line 1, in <module>       file "/tmp/pycharm-packaging/pynacl/setup.py", line 259, in <module>         "programming language :: python :: 3.5",       file "/usr/lib/python3.5/distutils/core.py", line 108, in setup         _setup_distribution = dist = klass(attrs)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/dist.py", line 315, in __init__         self.fetch_build_eggs(attrs['setup_requires'])       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/dist.py", line 361, in fetch_build_eggs         replace_conflicting=true,       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/pkg_resources/__init__.py", line 826, in resolve         dist = best[req.key] = env.best_match(req, ws, installer)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1092, in best_match         return self.obtain(req, installer)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1104, in obtain         return installer(requirement)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/dist.py", line 429, in fetch_build_egg         return cmd.easy_install(req)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 665, in easy_install         return self.install_item(spec, dist.location, tmpdir, deps)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 695, in install_item         dists = self.install_eggs(spec, download, tmpdir)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 876, in install_eggs         return self.build_and_install(setup_script, setup_base)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 1115, in build_and_install         self.run_setup(setup_script, setup_base, args)       file "/home/miguel/pycharmprojects/crossed/crossedenv/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 1103, in run_setup         raise distutilserror("setup script exited %s" % (v.args[0],))     distutils.errors.distutilserror: setup script exited error: command 'x86_64-linux-gnu-gcc' failed exit status 1      ----------------------------------------  command "python setup.py egg_info" failed error code 1 in /tmp/pycharm-packaging/pynacl/ 

i searched workarounds worked other people they're oter packages , didn't work me. help.

looks missing cffi, has couple of dependencies. according this need install couple of dependencies, python-dev , libffi-dev.