diff --git a/mibuild/sim/server.py b/mibuild/sim/server.py
index 99627a90c..d21cdc219 100644
--- a/mibuild/sim/server.py
+++ b/mibuild/sim/server.py
@@ -18,7 +18,7 @@ class PacketTooLarge(Exception):
 	pass
 
 class VerilatorServer:
-	def __init__(self, sockaddr="simsocket"):
+	def __init__(self, sockaddr="/tmp/simsocket"):
 		self.sockaddr = sockaddr
 		self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_SEQPACKET)
 		self._cleanup_file()
diff --git a/mibuild/sim/server_tb.cpp b/mibuild/sim/server_tb.cpp
index f92cc1678..9e7139d7e 100644
--- a/mibuild/sim/server_tb.cpp
+++ b/mibuild/sim/server_tb.cpp
@@ -178,7 +178,7 @@ int main(int argc, char **argv, char **env)
 
 	struct sim s;
 	sim_init(&s);
-	sim_connect(&s, "../../migen/mibuild/sim/simsocket"); // XXX use args
+	sim_connect(&s, "/tmp/simsocket");
 
 	pthread_t sim_receive_thread;