can't install qgis dev

[geoHeil]

brew install --no-sandbox qgis/qgisdev/qgis3-dev
==> Installing qgis3-dev from qgis/qgisdev
==> Cloning https://github.com/qgis/QGIS.git
Updating /Users/geoheil/Library/Caches/Homebrew/qgis3-dev--git
==> Checking out branch master
Already on 'master'
Your branch is up to date with 'origin/master'.
HEAD is now at 409d47e83e Modernize code
==> /usr/local/bin/pip3 install --user future psycopg2 python-dateutil httplib2 pytz six nose2 pygments jinja2 pyyaml requests owslib
Last 15 lines from /Users/geoheil/Library/Logs/Homebrew/qgis3-dev/01.pip3:
                  ^
    _proj.c:7488:13: error: no member named 'exc_traceback' in 'struct _ts'; did you mean 'curexc_traceback'?
        tstate->exc_traceback = local_tb;
                ^~~~~~~~~~~~~
                curexc_traceback
    /usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/include/python3.7m/pystate.h:238:15: note: 'curexc_traceback' declared here
        PyObject *curexc_traceback;
                  ^
    15 warnings and 15 errors generated.
    error: command 'clang' failed with exit status 1

    ----------------------------------------
Command "/usr/local/opt/python/bin/python3.7 -u -c "import setuptools, tokenize;__file__='/private/tmp/pip-install-_ux1p2pr/pyproj/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/tmp/pip-record-ovzp1pyw/install-record.txt --single-version-externally-managed --compile --user --prefix=" failed with error code 1 in /private/tmp/pip-install-_ux1p2pr/pyproj/
You are using pip version 10.0.1, however version 18.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.