diff --git a/Tools/posix_run.sh b/Tools/posix_run.sh
index fdeefb4a29..3a20dc3766 100755
--- a/Tools/posix_run.sh
+++ b/Tools/posix_run.sh
@@ -1,19 +1,5 @@
 #!/bin/bash
 
-if [ ! -d /fs/msdcard ] && [ ! -w /fs/msdcard ]
-	then
-	echo "Need to create/mount writable /fs/microsd"
-	echo "sudo mkdir -p /fs/msdcard"
-	echo "sudo chmod 777 /fs/msdcard"
-	exit 1
-fi
-
-if [ ! -d /eeprom ] && [ ! -w /eeprom ]
-	then
-	echo "Need to create/mount writable /eeprom"
-	echo "sudo mkdir -p /eeprom"
-	echo "sudo chmod 777 /eeprom"
-	exit 1
-fi
-
-Build/posix_default.build/mainapp posix-configs/posixtest/init/rc.S
+mkdir -p Build/posix_default.build/rootfs/fs/microsd
+mkdir -p Build/posix_default.build/rootfs/eeprom
+cd Build/posix_default.build && ./mainapp ../../posix-configs/posixtest/init/rc.S