I need to exclude any file that has name BUILD.BAZEL AND WORKSPACE.BAZEL(case sensitive). I cannot use negative lookahead as the Go Lang does not support negative lookahead. I have this.

I tried without negative lookahead —

(^([^B].$)|(B([^U].$|$))|(BU(^I].$|$))|(BUI([^L].$|$))|(BUIL([^D].$|$))|(BUILD([^.].$|$)))|(^([^W].$)|(W([^O].$|$))|(WO(^R].$|$))|(WOR([^K].$|$))|(WORK([^S].$|$))|(WORKS([^P].$|$))|(WORKSP([^A].$|$))|(WORKSPA([^C].$|$))|(WORKSPAC([^E].$|$))|(WORKSPACE([^.].$|$))).*(?:.bazel)

The above excludes BUILD.BAZEL successfully but does not exclude WORKSPACE.BAZEL. What am I doing wrong?