Cherry-pick #18913 to 7.7: Fix docker image for stan#18923

Merged

jsoriano merged 1 commit intoelastic:7.7from jsoriano:backport_18913_7.7

Jun 3, 2020

+3-3

Commits on Jun 3, 2020

Fix docker image building for stan (elastic#18913 )
jsoriano
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