1 files changed, 12 insertions, 8 deletions

diff --git a/src/nix-instantiate/nix-instantiate.cc b/src/nix-instantiate/nix-instantiate.cc
index 12fc8baf9..6b5ba595d 100644
--- a/src/nix-instantiate/nix-instantiate.cc
+++ b/src/nix-instantiate/nix-instantiate.cc
@@ -31,7 +31,8 @@ void processExpr(EvalState & state, const Strings & attrPaths,
     bool evalOnly, OutputKind output, bool location, Expr * e)
 {
     if (parseOnly) {
-        std::cout << format("%1%\n") % *e;
+        e->show(state.symbols, std::cout);
+        std::cout << "\n";
         return;
     }
 
@@ -51,22 +52,25 @@ void processExpr(EvalState & state, const Strings & attrPaths,
                 state.autoCallFunction(autoArgs, v, vRes);
             if (output == okXML)
                 printValueAsXML(state, strict, location, vRes, std::cout, context, noPos);
-            else if (output == okJSON)
+            else if (output == okJSON) {
                 printValueAsJSON(state, strict, vRes, v.determinePos(noPos), std::cout, context);
-            else {
+                std::cout << std::endl;
+            } else {
                 if (strict) state.forceValueDeep(vRes);
-                std::cout << vRes << std::endl;
+                vRes.print(state.symbols, std::cout);
+                std::cout << std::endl;
             }
         } else {
             DrvInfos drvs;
             getDerivations(state, v, "", autoArgs, drvs, false);
             for (auto & i : drvs) {
-                Path drvPath = i.queryDrvPath();
+                auto drvPath = i.requireDrvPath();
+                auto drvPathS = state.store->printStorePath(drvPath);
 
                 /* What output do we want? */
                 std::string outputName = i.queryOutputName();
                 if (outputName == "")
-                    throw Error("derivation '%1%' lacks an 'outputName' attribute ", drvPath);
+                    throw Error("derivation '%1%' lacks an 'outputName' attribute", drvPathS);
 
                 if (gcRoot == "")
                     printGCWarning();
@@ -75,9 +79,9 @@ void processExpr(EvalState & state, const Strings & attrPaths,
                     if (++rootNr > 1) rootName += "-" + std::to_string(rootNr);
                     auto store2 = state.store.dynamic_pointer_cast<LocalFSStore>();
                     if (store2)
-                        drvPath = store2->addPermRoot(store2->parseStorePath(drvPath), rootName);
+                        drvPathS = store2->addPermRoot(drvPath, rootName);
                 }
-                std::cout << fmt("%s%s\n", drvPath, (outputName != "out" ? "!" + outputName : ""));
+                std::cout << fmt("%s%s\n", drvPathS, (outputName != "out" ? "!" + outputName : ""));
             }
         }
     }