Installation error on up-to-date macOS

Got this error while installing on a fresh macOS: DistutilsOptionError: must supply either home or prefix/exec-prefix -- not both
Any ideas ? Complete output below :
➜ curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python
Retrieving metadata

Installing version: 0.9.1
  - Getting dependencies
An error has occured: Command '('/usr/local/opt/python@2/bin/python2.7', '-m', 'pip', 'install', 'poetry==0.9.1', '--target', '/var/folders/c6/p3_ghh9x29z_y7p5pwhq5v_m0000gr/T/poetry-installer-JFswdS/dist')' returned non-zero exit status 2
Collecting poetry==0.9.1
  Using cached https://files.pythonhosted.org/packages/7d/30/9e801da32a1453f9425061f03acb822fb9ea42f4e5de3f13aacda5564a24/poetry-0.9.1-py2.py3-none-any.whl
Collecting typing<4.0.0.0,>=3.6.0.0; (python_version >= "2.7.0.0" and python_version < "2.8.0.0") or (python_version >= "3.4.0.0" and python_version < "3.5.0.0") (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/0d/4d/4e5985d075d241d686a1663fa1f88b61d544658d08c1375c7c6aac32afc3/typing-3.6.4-py2-none-any.whl
Collecting pip-tools<3.0.0.0,>=2.0.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/4c/69/4f33fea6c50ff873b7905abc404d8c26aab2accf8c099d67a35aebc09871/pip_tools-2.0.2-py2.py3-none-any.whl
Collecting virtualenv<16.0.0.0,>=15.2.0.0; python_version >= "2.7.0.0" and python_version < "2.8.0.0" (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/ed/ea/e20b5cbebf45d3096e8138ab74eda139595d827677f38e9dd543e6015bdf/virtualenv-15.2.0-py2.py3-none-any.whl
Collecting requests<3.0.0.0,>=2.18.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/49/df/50aa1999ab9bde74656c2919d9c0c085fd2b3775fd3eca826012bef76d8c/requests-2.18.4-py2.py3-none-any.whl
Collecting pathlib2<3.0.0.0,>=2.3.0.0; python_version >= "2.7.0.0" and python_version < "2.8.0.0" (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/66/a7/9f8d84f31728d78beade9b1271ccbfb290c41c1e4dc13dbd4997ad594dcd/pathlib2-2.3.2-py2.py3-none-any.whl
Collecting toml<0.10.0.0,>=0.9.0.0 (from poetry==0.9.1)
Collecting jsonschema<3.0.0.0,>=2.6.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/77/de/47e35a97b2b05c2fadbec67d44cfcdcd09b8086951b331d82de90d2912da/jsonschema-2.6.0-py2.py3-none-any.whl
Collecting pyparsing<3.0.0.0,>=2.2.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/6a/8a/718fd7d3458f9fab8e67186b00abdd345b639976bc7fb3ae722e1b026a50/pyparsing-2.2.0-py2.py3-none-any.whl
Collecting cleo<0.7.0.0,>=0.6.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/3f/4d/fbdce6cebfdd45a6e1285b2710895661b9085dc417815b2f84f059ea8730/cleo-0.6.6-py2.py3-none-any.whl
Collecting pkginfo<2.0.0.0,>=1.4.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/a3/fe/f32a48d48f40a7209be9825fba2566cab92364787cf37de2e08300dd6ce7/pkginfo-1.4.2-py2.py3-none-any.whl
Collecting pyrsistent<0.15.0.0,>=0.14.2.0 (from poetry==0.9.1)
Collecting cachecontrol[filecache]<0.13.0.0,>=0.12.4.0 (from poetry==0.9.1)
Collecting requests-toolbelt<0.9.0.0,>=0.8.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/97/8a/d710f792d6f6ecc089c5e55b66e66c3f2f35516a1ede5a8f54c13350ffb0/requests_toolbelt-0.8.0-py2.py3-none-any.whl
Collecting cachy<0.3.0.0,>=0.2.0.0 (from poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/26/37/8ce3e7b330078b6797a34e79a80a8ad6935e404a3b903765417182c9ce19/cachy-0.2.0-py2.py3-none-any.whl
Collecting first (from pip-tools<3.0.0.0,>=2.0.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/71/12/1b24a85f543658804027de982f7e5cb80543ea33ec396c887c099c75274c/first-2.0.1-py2.py3-none-any.whl
Collecting click>=6 (from pip-tools<3.0.0.0,>=2.0.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/34/c1/8806f99713ddb993c5366c362b2f908f18269f8d792aff1abfd700775a77/click-6.7-py2.py3-none-any.whl
Collecting six (from pip-tools<3.0.0.0,>=2.0.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/67/4b/141a581104b1f6397bfa78ac9d43d8ad29a7ca43ea90a2d863fe3056e86a/six-1.11.0-py2.py3-none-any.whl
Collecting chardet<3.1.0,>=3.0.2 (from requests<3.0.0.0,>=2.18.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/bc/a9/01ffebfb562e4274b6487b4bb1ddec7ca55ec7510b22e4c51f14098443b8/chardet-3.0.4-py2.py3-none-any.whl
Collecting certifi>=2017.4.17 (from requests<3.0.0.0,>=2.18.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/7c/e6/92ad559b7192d846975fc916b65f667c7b8c3a32bea7372340bfe9a15fa5/certifi-2018.4.16-py2.py3-none-any.whl
Collecting urllib3<1.23,>=1.21.1 (from requests<3.0.0.0,>=2.18.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/63/cb/6965947c13a94236f6d4b8223e21beb4d576dc72e8130bd7880f600839b8/urllib3-1.22-py2.py3-none-any.whl
Collecting idna<2.7,>=2.5 (from requests<3.0.0.0,>=2.18.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/27/cc/6dd9a3869f15c2edfab863b992838277279ce92663d334df9ecf5106f5c6/idna-2.6-py2.py3-none-any.whl
Collecting scandir; python_version < "3.5" (from pathlib2<3.0.0.0,>=2.3.0.0; python_version >= "2.7.0.0" and python_version < "2.8.0.0"->poetry==0.9.1)
Collecting functools32; python_version == "2.7" (from jsonschema<3.0.0.0,>=2.6.0.0->poetry==0.9.1)
Collecting pastel<0.2.0,>=0.1.0 (from cleo<0.7.0.0,>=0.6.0.0->poetry==0.9.1)
Collecting pylev<2.0.0,>=1.3 (from cleo<0.7.0.0,>=0.6.0.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/40/1c/7dff1d242bf1e19f9c6202f0ba4e6fd18cc7ecb8bc85b17b2d16c806e228/pylev-1.3.0-py2.py3-none-any.whl
Collecting msgpack-python (from cachecontrol[filecache]<0.13.0.0,>=0.12.4.0->poetry==0.9.1)
Collecting lockfile>=0.9; extra == "filecache" (from cachecontrol[filecache]<0.13.0.0,>=0.12.4.0->poetry==0.9.1)
  Using cached https://files.pythonhosted.org/packages/c8/22/9460e311f340cb62d26a38c419b1381b8593b0bb6b5d1f056938b086d362/lockfile-0.12.2-py2.py3-none-any.whl
Installing collected packages: typing, first, click, six, pip-tools, virtualenv, chardet, certifi, urllib3, idna, requests, scandir, pathlib2, toml, functools32, jsonschema, pyparsing, pastel, pylev, cleo, pkginfo, pyrsistent, msgpack-python, lockfile, cachecontrol, requests-toolbelt, cachy, poetry
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/basecommand.py", line 228, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/commands/install.py", line 335, in run
    use_user_site=options.use_user_site,
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/req/__init__.py", line 49, in install_given_reqs
    **kwargs
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/req/req_install.py", line 748, in install
    use_user_site=use_user_site, pycompile=pycompile,
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/req/req_install.py", line 961, in move_wheel_files
    warn_script_location=warn_script_location,
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/wheel.py", line 216, in move_wheel_files
    prefix=prefix,
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/locations.py", line 165, in distutils_scheme
    i.finalize_options()
  File "/usr/local/Cellar/python@2/2.7.15/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/command/install.py", line 264, in finalize_options
    "must supply either home or prefix/exec-prefix -- not both"
DistutilsOptionError: must supply either home or prefix/exec-prefix -- not both
python-poetry / poetry

Installation error on up-to-date macOS #133
