No URL provided, cache will not be downloaded from shared cache server. Instead a local version of cache will be extracted. Successfully extracted cache Executing "step_script" stage of the job script Using docker image sha256:28dca6642db82aaecbed18101d9966f001e8de6691e1a1718c2927c124d81262 for node:10 with digest node@sha256:59531d2835edd5161c8f9512f9e095b1836f7a1fcb0ab73e005ec46047384911 ... $ mkdir ebooks $ gitbook install /bin/bash: line 122: gitbook: command not found Cleaning up project directory and file based variables ERROR: Job failed: exit code 1