[chef] Chef timeout

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I'm writing a recipe that involves installing some packages with yum. One of
these packages takes a long time installing, and during the installation of
this package, Chef times out with the message "ERROR: yum -d0 -e0 -y install
<packagename> exceeded timeout 900"

I have browsed and searched the documentation, but have not found any 
reference
to how to increase this timeout. Can someone shed light on this?