diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index 8c55da2686e595ebf06e93452a06311572deabbc..07ef79382d0f5a1fa4a2fad2b8c0d384c6ccf911 100644
--- a/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -779,8 +779,10 @@ std::exception_ptr RemoteStore::Connection::processStderr(Sink * sink, Source *
             return std::make_exception_ptr(Error(status, error));
         }
 
-        else if (msg == STDERR_NEXT)
-            printError(chomp(readString(from)));
+        else if (msg == STDERR_NEXT) {
+            string s = chomp(readString(from));
+            printMsg(lvlVomit, "stderr %s", s);
+        }
 
         else if (msg == STDERR_START_ACTIVITY) {
             auto act = readNum<ActivityId>(from);
diff --git a/src/libutil/logging.cc b/src/libutil/logging.cc
index 3cc4ef8f15b91a686aee5be19e01e6f772ad2413..777650de5cd8becbb7333abc36accebdf89e4ff0 100644
--- a/src/libutil/logging.cc
+++ b/src/libutil/logging.cc
@@ -63,6 +63,16 @@ public:
         writeToStderr(prefix + filterANSIEscapes(fs.s, !tty) + "\n");
     }
 
+    void result(ActivityId act, ResultType type, const std::vector<Field> & fields) override
+    {
+        if (type == resBuildLogLine || type == resPostBuildLogLine) {
+            assert(0 < fields.size());
+            assert(fields[0].type == Logger::Field::tString);
+            auto lastLine = fields[0].s;
+            log(lvlInfo, lastLine);
+        }
+    }
+
     void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
         const std::string & s, const Fields & fields, ActivityId parent)
         override