Did: firedrake-clean and/or recovering from the broken installation by cd src/firedrake git pull ./scripts/firedrake-install --rebuild-script then firedrake-update but get error message: Error: No such keg: /usr/local/Cellar/autoconf Error: Cannot write to /usr/local/Cellar Traceback (most recent call last): File "/Users/amtob/werk/firedrake/bin/firedrake-update", line 813, in <module> brew_install("autoconf") File "/Users/amtob/werk/firedrake/bin/firedrake-update", line 250, in brew_install check_call(["brew", "install"] + arguments) File "/Users/amtob/werk/firedrake/bin/firedrake-update", line 228, in check_call subprocess.check_call(arguments, env=env) File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 540, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['brew', 'install', 'autoconf']' returned non-zero exit status 1 on laptop while firedrake worked few weeks ago.