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attrs:
let
strict = derivationStrict attrs;
attrValues = attrs:
map (name: builtins.getAttr name attrs) (builtins.attrNames attrs);
outputToAttrListElement = output:
{ name = output;
value = attrs // {
outPath = builtins.getAttr (output + "Path") strict;
drvPath = strict.drvPath;
type = "derivation";
currentOutput = output;
} // outputsAttrs // { all = allList; };
};
outputsList =
if attrs ? outputs
then map outputToAttrListElement attrs.outputs
else [ (outputToAttrListElement "out") ];
outputsAttrs = builtins.listToAttrs outputsList;
allList = attrValues outputsAttrs;
head = if attrs ? outputs then builtins.head attrs.outputs else "out";
in builtins.getAttr head outputsAttrs
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