Store parsed hashes in `DerivationOutput`

It's best to detect invalid data as soon as possible, with data types
that make storing it impossible.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/nix/show-derivation.cc b/src/nix/show-derivation.cc
index 0ede7b468..b2ec71dbb 100644
--- a/src/nix/show-derivation.cc
+++ b/src/nix/show-derivation.cc
@@ -69,9 +69,9 @@ struct CmdShowDerivation : InstallablesCommand
                 for (auto & output : drv.outputs) {
                     auto outputObj(outputsObj.object(output.first));
                     outputObj.attr("path", store->printStorePath(output.second.path));
-                    if (output.second.hash != "") {
-                        outputObj.attr("hashAlgo", output.second.hashAlgo);
-                        outputObj.attr("hash", output.second.hash);
+                    if (output.second.hash) {
+                        outputObj.attr("hashAlgo", output.second.hash->printMethodAlgo());
+                        outputObj.attr("hash", output.second.hash->hash.to_string(Base16, false));
                     }
                 }
             }