Dear Firedrakers, The new form compiler has just landed. Since this changes the set of dependencies that Firedrake needs, one must rebuild the install script before updating. Follow these instructions for updating: cd to the top directory of the firedrake virtualenv . ./bin/activate cd src/firedrake/ git pull ./scripts/firedrake-install --rebuild-script --your-install-options Replace --your-install-options with the options you used to install Firedrake. Then run: firedrake-update --clean If the update script asks you to run it again, then please do so. When the update finished, do not forget to clean your cache: firedrake-clean New installations should just work. Kind regards, Miklós