[Nix-dev] error: cannot auto-call a function that has an argument without a default value (‘stdenv’)

[tj5527]

Following the example at http://nixos.org/nix/manual/#chap-writing-nix-expressions to build hello package. But `nix-build -A hello` throws error "error: cannot auto-call a function that has an argument without a default value (‘stdenv’)"
How can I fix this problem?
My nix-build (Nix) is 1.11.11
Thanks
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