Fix technology stack
Fix technology stack


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Former-commit-id: 590b31aecaa6698f9a95efd077fa525ff0e41dbe
Former-commit-id: 31e91cbf5d7b0450553593690635147459f5c0a4
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine