how to ignore a folder in a given location - mercurial

How can ignore the folder called build in the root of my project, but not ignore a f开发者_JAVA百科older called build anywhere else?

i.e.

/myprog/.hgignore
/myproj/make
/myproj/build <-ignore this
/myproj/lib/somelib/build <- dont ignore this

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You could use the regexp syntax as per doc. Your .hgignore should then contain

syntax: regexp
^build

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You can use the .hgignore file. You will want to add a line

/myproj/build