adding daemonNiceLevel option. running biulds with niceness 0 can be annoying
adding daemonNiceLevel option. running biulds with niceness 0 can be annoying

git-svn-id: a8013ee9bf6b053da8ea218c5059f3906c3a3af2@16420 70bd8c7a-acb8-0310-9f0d-9cc1c95dcdbb

bnordgren/nixos,bnordgren/nixos,bnordgren/nixos,bnordgren/nixos,bnordgren/nixos