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Last active October 12, 2017 22:26
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foo.nix
{ pkgs ? import <nixpkgs> {} }:
let
callPackage = pkgs.lib.callPackageWith { foo = 1; };
bar = 2;
baz = 3;
in
{
x = callPackage ({ foo }: foo) {};
y = callPackage ({ bar }: bar) { bar = bar; };
z = callPackage ({ baz }: baz) {};
}
# nix-instantiate --eval foo.nix -A x
# 1
# nix-instantiate --eval foo.nix -A y
# 2
# nix-instantiate --eval foo.nix -A z
# error: anonymous function at foo.nix:12:20 called without required argument 'baz'
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