diff --git a/tools/build.gradle b/tools/build.gradle
index 153656a174..5a932c358f 100644
--- a/tools/build.gradle
+++ b/tools/build.gradle
@@ -363,7 +363,7 @@ task pack(dependsOn: classes){
         long ms = System.currentTimeMillis()
 
         //antialias everything except UI elements
-        fileTree(dir: '../core/assets-raw/sprites_out/', include: "**/*.png").visit{ file ->
+        fileTree(dir: new File(rootDir, 'core/assets-raw/sprites_out/').absolutePath, include: "**/*.png").visit{ file ->
             if(file.isDirectory() || (file.toString().replace("\\", "/").contains("/ui/") && file.toString().startsWith("icon-")) || file.toString().contains(".9.png")) return
 
             executor.submit{