1 files changed, 5 insertions, 2 deletions

diff --git a/check b/check
index 533ac50..9dac5d8 100755
--- a/check
+++ b/check
@@ -58,8 +58,10 @@ class Runcmd:
         self.msg(f"RUN: {argv} {kwargs}")
 
         if not self._verbose:
-            kwargs["stdout"] = PIPE
-            kwargs["stderr"] = STDOUT
+            if "stdout" not in kwargs:
+                kwargs["stdout"] = PIPE
+            if "stderr" not in kwargs:
+                kwargs["stderr"] = STDOUT
 
         assert "key" not in kwargs
         env = dict(os.environ)
@@ -179,6 +181,7 @@ class Runcmd:
                 filename,
             ],
             stdout=PIPE,
+            stderr=PIPE,
         ).stdout.decode("UTF-8")
         metadata = json.loads(metadata)
         impls = metadata.get("impls", {})