diff --git a/lxc/execute b/lxc/execute
index 3dff13f..8fbfeb9 100755
--- a/lxc/execute
+++ b/lxc/execute
@@ -18,6 +18,7 @@ basepath="/var/lib/lxc/piston/rootfs"
 exec 200>$dir/lockfile
 flock 200
 
+touch $dir/i
 runner=$(cat $dir/i)
 let 'runner = runner % 150 + 1'
 
diff --git a/shared/execute.js b/shared/execute.js
index 238fdc6..c8b8635 100644
--- a/shared/execute.js
+++ b/shared/execute.js
@@ -37,8 +37,6 @@ function execute(language, source, stdin = '', args = []) {
         });
 
         process.on('exit', code => {
-            unlinkSync(sourceFile);
-
             stderr = stderr.trim().substring(0, OUTPUT_LIMIT);
             stdout = stdout.trim().substring(0, OUTPUT_LIMIT);
             output = output.trim().substring(0, OUTPUT_LIMIT);