Simplify fixed-output check
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@ -1066,12 +1066,8 @@ void DerivationGoal::haveDerivation()
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/* Reject doing a hash build of anything other than a fixed-output
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derivation. */
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if (buildMode == bmHash) {
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if (drv->outputs.size() != 1 ||
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drv->outputs.find("out") == drv->outputs.end() ||
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drv->outputs["out"].hashAlgo == "")
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throw Error(format("cannot do a hash build of non-fixed-output derivation ‘%1%’") % drvPath);
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}
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if (buildMode == bmHash && !drv->isFixedOutput())
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throw Error("cannot do a hash build of non-fixed-output derivation ‘%1%’", drvPath);
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/* We are first going to try to create the invalid output paths
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through substitutes. If that doesn't work, we'll build
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