https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64257
--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> --- https://gcc.gnu.org/ml/gccadmin/2015-q1/msg00077.html had: sphinx-build -b html -d _build/doctrees . _build/html Making output directory... Running Sphinx v0.6.6 Theme error: no theme named 'pyramid' found (missing theme.conf?) make: *** [html] Error 1