4 files changed, 13 insertions, 6 deletions
diff --git a/src/libstore/binary-cache-store.cc b/src/libstore/binary-cache-store.cc
index 9c6424a496e6..93caba67ea94 100644
--- a/src/libstore/binary-cache-store.cc
+++ b/src/libstore/binary-cache-store.cc
@@ -121,7 +121,7 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::str
 
             {
                 auto res = jsonRoot.placeholder("root");
-                listNar(res, narAccessor, "");
+                listNar(res, narAccessor, "", true);
             }
         }
 
diff --git a/src/libstore/nar-accessor.cc b/src/libstore/nar-accessor.cc
index b2d15c395f10..e5042208e58b 100644
--- a/src/libstore/nar-accessor.cc
+++ b/src/libstore/nar-accessor.cc
@@ -182,7 +182,8 @@ ref<FSAccessor> makeNarAccessor(ref<const std::string> nar)
     return make_ref<NarAccessor>(nar);
 }
 
-void listNar(JSONPlaceholder & res, ref<FSAccessor> accessor, const Path & path)
+void listNar(JSONPlaceholder & res, ref<FSAccessor> accessor,
+    const Path & path, bool recurse)
 {
     auto st = accessor->stat(path);
 
@@ -200,8 +201,11 @@ void listNar(JSONPlaceholder & res, ref<FSAccessor> accessor, const Path & path)
         {
             auto res2 = obj.object("entries");
             for (auto & name : accessor->readDirectory(path)) {
-                auto res3 = res2.placeholder(name);
-                listNar(res3, accessor, path + "/" + name);
+                if (recurse) {
+                    auto res3 = res2.placeholder(name);
+                    listNar(res3, accessor, path + "/" + name, true);
+                } else
+                    res2.object(name);
             }
         }
         break;
diff --git a/src/libstore/nar-accessor.hh b/src/libstore/nar-accessor.hh
index 7699cbbb587d..ed8fe15cad23 100644
--- a/src/libstore/nar-accessor.hh
+++ b/src/libstore/nar-accessor.hh
@@ -10,6 +10,9 @@ ref<FSAccessor> makeNarAccessor(ref<const std::string> nar);
 
 class JSONPlaceholder;
 
-void listNar(JSONPlaceholder & res, ref<FSAccessor> accessor, const Path & path);
+/* Write a JSON representation of the contents of a NAR (except file
+   contents). */
+void listNar(JSONPlaceholder & res, ref<FSAccessor> accessor,
+    const Path & path, bool recurse);
 
 }
diff --git a/src/nix/ls.cc b/src/nix/ls.cc
index 5408c092992e..69620595d8ca 100644
--- a/src/nix/ls.cc
+++ b/src/nix/ls.cc
@@ -77,7 +77,7 @@ struct MixLs : virtual Args, MixJSON
 
         if (json) {
             JSONPlaceholder jsonRoot(std::cout);
-            listNar(jsonRoot, accessor, path);
+            listNar(jsonRoot, accessor, path, recursive);
         } else
             listText(accessor);
     }