diff --git a/src/taggingbackends/explorer.py b/src/taggingbackends/explorer.py
index 40644c839ee66ecd13b5d5aeea409fd236224085..f05f382062ebc5d941b29bfeba78dbe1fe42e637 100644
--- a/src/taggingbackends/explorer.py
+++ b/src/taggingbackends/explorer.py
@@ -201,7 +201,8 @@ Cannot find any Python package in project root directory:
                 line = line[len(prefix):]
                 if line.startswith("root:"):
                     line = line[5:]
-                log(line.lstrip())
+                line = '\n'.join(line.lstrip().split(r'\n'))
+                log(line)
                 return
         # other Python warning messages from dependencies
         if line.startswith("  warn(") or line.startswith("  warnings.warn("):
@@ -260,13 +261,16 @@ Cannot find any Python package in project root directory:
             lines = []
             for line in msg.splitlines():
                 lines = self._parse_stdout(logger, lines, line)
+            if lines:
+                logger.info("\n".join(lines))
         if ret.stderr:
             msg = ret.stderr.decode("utf-8")
             lines = []
             for line in msg.splitlines():
                 self._parse_stderr(logger, lines, line)
             if lines:
-                raise Exception(f"in {path.name}:\n"+"\n".join(lines))
+                msg = f"in {path.name}:\n"+"\n".join(lines)
+                raise Exception(msg)
         sys.stderr.flush()
         sys.stdout.flush()
         return ret