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lang-c
\wnor+are POSIXsed.\wis[[:alnum:]]; the portable form of+is{1,}(one or more occurences). So your litetal command issed -E 's/deploy-[[:alnum:]]{1,}-([[:alnum:]]{1,})/\1/'. But in the end, it seems you are looking forsed '/deploy-/s/.*-//'