diff --git a/src/ssn/installation/taskManager.ts b/src/ssn/installation/taskManager.ts
index 710ecfa..deae0b7 100644
--- a/src/ssn/installation/taskManager.ts
+++ b/src/ssn/installation/taskManager.ts
@@ -1,7 +1,8 @@
 export default function taskManager(tasks: Array<() => Promise<void>>, maxConcurrentTasks: number): Promise<any[]> {
   return new Promise(function(resolve, reject) {
-    const returnValues = Array(tasks.length);
-    const remainingTasks = tasks;
+    const origLength = tasks.length;
+    const returnValues = Array(origLength);
+    const remainingTasks = tasks.slice();
     let currentlyRunningTasks = 0;
 
     const startNewTask = function() {
@@ -12,8 +13,8 @@ export default function taskManager(tasks: Array<() => Promise<void>>, maxConcur
         }
       } else {
         //If there is at least one task left, complete it
-        const curTask = remainingTasks.pop() as () => Promise<void>;
-        const curTaskIndex = remainingTasks.length;
+        const curTask = remainingTasks.shift() as () => Promise<void>;
+        const curTaskIndex = origLength - remainingTasks.length;
         currentlyRunningTasks += 1;
         curTask().then(function(...result) {
           returnValues[curTaskIndex] = result;