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let
pkgs_ = with pkgs; {
a = derivation {
name = "a";
system = builtins.currentSystem;
builder = "/bin/sh";
args = [ "-c" "touch $out" ];
inherit b;
};
b = derivation {
name = "b";
system = builtins.currentSystem;
builder = "/bin/sh";
args = [ "-c" "touch $out" ];
inherit a;
};
c = b;
};
packageOverrides = pkgs: with pkgs; {
b = derivation (b.drvAttrs // { name = "${b.name}-overridden"; });
};
pkgs = pkgs_ // (packageOverrides pkgs_);
in "${pkgs.a.b.name} ${pkgs.c.name} ${pkgs.b.a.name}"
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