diff --git a/.github/workflows/smoketest.yaml b/.github/workflows/smoketest.yaml
index 84cefcf..c0cfb02 100644
--- a/.github/workflows/smoketest.yaml
+++ b/.github/workflows/smoketest.yaml
@@ -116,4 +116,4 @@ jobs:
         # Guard against endless loop in QEMU run (120 CPU secs)
         ulimit -t 120
         # Run QEMU with simulated network
-        $CFG_QEMU_BIN -M ${{ matrix.config.qemu-machine }} $CFG_QEMU_OPT $CFG_QEMU_IMG -display none -nographic -semihosting -sd sdcard.img -netdev "user,id=net0,hostfwd=tcp::5000-:5000,guestfwd=tcp:10.0.2.100:5001-cmd:yes simulated server" -device usb-net,netdev=net0
+        $CFG_QEMU_BIN -M ${{ matrix.config.qemu-machine }} $CFG_QEMU_OPT $CFG_QEMU_IMG -display none -nographic -semihosting -sd sdcard.img -netdev "user,id=net0,hostfwd=tcp::5000-:5000,guestfwd=tcp:10.0.2.100:5001-cmd:/bin/echo simulated server" -device usb-net,netdev=net0
diff --git a/libs/circle-newlib b/libs/circle-newlib
index 8558c64..c937ed5 160000
--- a/libs/circle-newlib
+++ b/libs/circle-newlib
@@ -1 +1 @@
-Subproject commit 8558c64b81c3c07da84a9ea3f7aee2d6e366529d
+Subproject commit c937ed51246545aa323324e1341af118c783dc12