diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index bfad8fb21..2892b0407 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -623,7 +623,10 @@ uint64_t LocalStore::addValidPath(State & state,
        efficiently query whether a path is an output of some
        derivation. */
     if (info.path.isDerivation()) {
-        auto drv = readDerivation(info.path);
+        auto drv = parseDerivation(
+            *this,
+            readFile(Store::toRealPath(info.path)),
+            Derivation::nameFromPath(info.path));
 
         /* Verify that the output paths in the derivation are correct
            (i.e., follow the scheme for computing output paths from
@@ -1000,7 +1003,11 @@ void LocalStore::registerValidPaths(const ValidPathInfos & infos)
         for (auto & i : infos)
             if (i.path.isDerivation()) {
                 // FIXME: inefficient; we already loaded the derivation in addValidPath().
-                checkDerivationOutputs(i.path, readDerivation(i.path));
+                checkDerivationOutputs(i.path,
+                    parseDerivation(
+                        *this,
+                        readFile(Store::toRealPath(i.path)),
+                        Derivation::nameFromPath(i.path)));
             }
 
         /* Do a topological sort of the paths.  This will throw an