diff --git a/amaranth/build/run.py b/amaranth/build/run.py
index b07da8e..c6a281d 100644
--- a/amaranth/build/run.py
+++ b/amaranth/build/run.py
@@ -176,7 +176,7 @@ class BuildPlan:
                 # Show the output from the server while products are built.
                 buf = channel.recv(1024)
                 while buf:
-                    print(buf.decode("utf-8"), end="")
+                    print(buf.decode("utf-8", errors="replace"), end="")
                     buf = channel.recv(1024)
 
         return RemoteSSHBuildProducts(connect_to, root)