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brew install --build-from-source <formula>
, where<formula>
is the name of the formula you're submitting?brew audit --strict <formula>
(after doingbrew install <formula>
)?Without docbook-xsl and the corresponding
XML_CATALOG_FILES
in the environment,xsltproc(1)
attempts to load .xsl files — e.g., http://docbook.sourceforge.net/release/xsl/current/html/lists.xsl — from the Internet, and when the build is parallelized, that is, multiplexsltproc
processes attempt to fetch the same .xsl file at the same time and presumably write to the same location, a race condition is triggered and all processes exit with status 5.An alternative fix is
ENV.deparallelize
(at least duringmake docs
), but having to fetch .xsl files on the go and thus preventing offline builds is probably something to be frowned upon.#6408.