Fix docbuild environment.
Fix docbuild environment.

ALikhachev/saltfs,setupminimal/saltfs,rwaweber/saltfs,rwaweber/saltfs,setupminimal/saltfs,UK992/saltfs,servo/saltfs,rwaweber/saltfs,ALikhachev/saltfs,ALikhachev/saltfs,UK992/saltfs,UK992/saltfs,servo/saltfs,setupminimal/saltfs