pip install -U yotta on Msys2 - libssl error

gistfile1.txt

ImaUsr@TheMachine MSYS ~
$ pip2 --version
pip 7.1.2 from /usr/lib/python2.7/site-packages (python 2.7)

ImaUsr@TheMachine MSYS ~
$ python2 --version
Python 2.7.10

ImaUsr@TheMachine MSYS ~
$ pip2 install -U yotta
Collecting yotta
Requirement already up-to-date: semantic-version<3,>=2.3.1 in /usr/lib/python2.7/site-packages (from yotta)
Requirement already up-to-date: Jinja2<3,>=2.7.0 in /usr/lib/python2.7/site-packages (from yotta)
Requirement already up-to-date: argcomplete<1.0,>=0.8.0 in /usr/lib/python2.7/site-packages (from yotta)
Requirement already up-to-date: jsonschema<3.0,>=2.4.0 in /usr/lib/python2.7/site-packages (from yotta)
Collecting cryptography>=0.8 (from yotta)
  Using cached cryptography-1.0.2.tar.gz
Collecting colorama<0.4,>=0.3 (from yotta)
Collecting requests[security]<3,>=2.4.3 (from yotta)
  Using cached requests-2.8.1-py2.py3-none-any.whl
Collecting PyGithub<2,>=1.25 (from yotta)
Collecting PyJWT<2.0,>=1.0 (from yotta)
  Using cached PyJWT-1.4.0-py2.py3-none-any.whl
Collecting mbed-test-wrapper<0.1.0,>=0.0.2 (from yotta)
Collecting valinor<1.0,>=0.0.0 (from yotta)
Collecting jsonpointer<=2.0,>=1.9 (from yotta)
  Using cached jsonpointer-1.9-py2-none-any.whl
Collecting hgapi<2,>=1.7 (from yotta)
Collecting intelhex<3.0,>=2.0 (from yotta)
  Using cached intelhex-2.0-py2.py3-none-any.whl
Collecting pathlib<1.1,>=1.0.1 (from yotta)
Requirement already up-to-date: MarkupSafe in /usr/lib/python2.7/site-packages (from Jinja2<3,>=2.7.0->yotta)
Requirement already up-to-date: functools32 in /usr/lib/python2.7/site-packages (from jsonschema<3.0,>=2.4.0->yotta)
Requirement already up-to-date: idna>=2.0 in /usr/lib/python2.7/site-packages (from cryptography>=0.8->yotta)
Requirement already up-to-date: pyasn1>=0.1.8 in /usr/lib/python2.7/site-packages (from cryptography>=0.8->yotta)
Requirement already up-to-date: six>=1.4.1 in /usr/lib/python2.7/site-packages (from cryptography>=0.8->yotta)
Requirement already up-to-date: setuptools in /usr/lib/python2.7/site-packages (from cryptography>=0.8->yotta)
Requirement already up-to-date: enum34 in /usr/lib/python2.7/site-packages (from cryptography>=0.8->yotta)
Requirement already up-to-date: ipaddress in /usr/lib/python2.7/site-packages (from cryptography>=0.8->yotta)
Collecting cffi>=1.1.0 (from cryptography>=0.8->yotta)
  Using cached cffi-1.2.1.tar.gz
Collecting pyOpenSSL (from requests[security]<3,>=2.4.3->yotta)
  Using cached pyOpenSSL-0.15.1-py2.py3-none-any.whl
Collecting ndg-httpsclient (from requests[security]<3,>=2.4.3->yotta)
Collecting project-generator<0.8.0,>=0.7.0 (from valinor<1.0,>=0.0.0->yotta)
Collecting pyOCD<1.0,>=0.3 (from valinor<1.0,>=0.0.0->yotta)
Collecting pyyaml<4,>=3 (from valinor<1.0,>=0.0.0->yotta)
Requirement already up-to-date: pycparser in /usr/lib/python2.7/site-packages (from cffi>=1.1.0->cryptography>=0.8->yotta)
Collecting argparse (from project-generator<0.8.0,>=0.7.0->valinor<1.0,>=0.0.0->yotta)
  Using cached argparse-1.4.0-py2.py3-none-any.whl
Collecting xmltodict (from project-generator<0.8.0,>=0.7.0->valinor<1.0,>=0.0.0->yotta)
Collecting project-generator-definitions<0.2.0,>=0.1.0 (from project-generator<0.8.0,>=0.7.0->valinor<1.0,>=0.0.0->yotta)
Building wheels for collected packages: cryptography, cffi
  Running setup.py bdist_wheel for cryptography
  Complete output from command /usr/bin/python2 -c "import setuptools;__file__='/tmp/pip-build-UhZDDV/cryptography/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmprZuRt2pip-wheel-:
  c/_cffi_backend.c:13:17: fatal error: ffi.h: No such file or directory
   #include <ffi.h>
                   ^
  compilation terminated.
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "/tmp/pip-build-UhZDDV/cryptography/setup.py", line 313, in <module>
      **keywords_with_side_effects(sys.argv)
    File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
      _setup_distribution = dist = klass(attrs)
    File "/usr/lib/python2.7/site-packages/setuptools/dist.py", line 268, in __init__
      self.fetch_build_eggs(attrs['setup_requires'])
    File "/usr/lib/python2.7/site-packages/setuptools/dist.py", line 313, in fetch_build_eggs
      replace_conflicting=True,
    File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 836, in resolve
      dist = best[req.key] = env.best_match(req, ws, installer)
    File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1081, in best_match
      return self.obtain(req, installer)
    File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1093, in obtain
      return installer(requirement)
    File "/usr/lib/python2.7/site-packages/setuptools/dist.py", line 380, in fetch_build_egg
      return cmd.easy_install(req)
    File "/usr/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 638, in easy_install
      return self.install_item(spec, dist.location, tmpdir, deps)
    File "/usr/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 668, in install_item
      dists = self.install_eggs(spec, download, tmpdir)
    File "/usr/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 851, in install_eggs
      return self.build_and_install(setup_script, setup_base)
    File "/usr/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 1079, in build_and_install
      self.run_setup(setup_script, setup_base, args)
    File "/usr/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 1067, in run_setup
      raise DistutilsError("Setup script exited with %s" % (v.args[0],))
  distutils.errors.DistutilsError: Setup script exited with error: command 'gcc' failed with exit status 1

  ----------------------------------------
  Failed building wheel for cryptography
  Running setup.py bdist_wheel for cffi
  Complete output from command /usr/bin/python2 -c "import setuptools;__file__='/tmp/pip-build-UhZDDV/cffi/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmp5yq_n4pip-wheel-:
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.msys-2.3.0-x86_64-2.7
  creating build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/api.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/backend_ctypes.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/cffi_opcode.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/commontypes.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/cparser.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/ffiplatform.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/gc_weakref.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/lock.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/model.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/recompiler.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/setuptools_ext.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/vengine_cpy.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/vengine_gen.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/verifier.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/__init__.py -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/_cffi_include.h -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  copying cffi/parse_c_type.h -> build/lib.msys-2.3.0-x86_64-2.7/cffi
  running build_ext
  building '_cffi_backend' extension
  creating build/temp.msys-2.3.0-x86_64-2.7
  creating build/temp.msys-2.3.0-x86_64-2.7/c
  gcc -fno-strict-aliasing -march=x86-64 -mtune=generic -O2 -pipe -DNDEBUG -DNDEBUG -march=x86-64 -mtune=generic -O2 -pipe -DNDEBUG -DUSE__THREAD -I/usr/include/ffi -I/usr/include/libffi -I/usr/include/python2.7 -c c/_cffi_backend.c -o build/temp.msys-2.3.0-x86_64-2.7/c/_cffi_backend.o
  c/_cffi_backend.c:13:17: fatal error: ffi.h: No such file or directory
   #include <ffi.h>
                   ^
  compilation terminated.
  error: command 'gcc' failed with exit status 1

  ----------------------------------------
  Failed building wheel for cffi
Failed to build cryptography cffi
Installing collected packages: cffi, cryptography, colorama, pyOpenSSL, ndg-httpsclient, requests, PyGithub, PyJWT, mbed-test-wrapper, argparse, xmltodict, pyyaml, project-generator-definitions, project-generator, intelhex, pyOCD, valinor, jsonpointer, hgapi, pathlib, yotta
  Running setup.py install for cffi
    Complete output from command /usr/bin/python2 -c "import setuptools, tokenize;__file__='/tmp/pip-build-UhZDDV/cffi/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-8Omwwz-record/install-record.txt --single-version-externally-managed --compile:
    running install
    running build
    running build_py
    running build_ext
    building '_cffi_backend' extension
    gcc -fno-strict-aliasing -march=x86-64 -mtune=generic -O2 -pipe -DNDEBUG -DNDEBUG -march=x86-64 -mtune=generic -O2 -pipe -DNDEBUG -DUSE__THREAD -I/usr/include/ffi -I/usr/include/libffi -I/usr/include/python2.7 -c c/_cffi_backend.c -o build/temp.msys-2.3.0-x86_64-2.7/c/_cffi_backend.o
    c/_cffi_backend.c:13:17: fatal error: ffi.h: No such file or directory
     #include <ffi.h>
                     ^
    compilation terminated.
    error: command 'gcc' failed with exit status 1

    ----------------------------------------
Command "/usr/bin/python2 -c "import setuptools, tokenize;__file__='/tmp/pip-build-UhZDDV/cffi/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-8Omwwz-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-UhZDDV/cffi