blueprint-compiler use stdout for some god forsaken reason

build.rs

@@ -26,9 +26,9 @@ fn main() {
         let output = command.output().unwrap();
         assert!(
             output.status.success(),
-            "blueprint-compiler failed with exit status {} and stderr:\n{}",
+            "blueprint-compiler failed with exit status {} and stdout:\n{}",
             output.status,
-            String::from_utf8_lossy(&output.stderr)
+            String::from_utf8_lossy(&output.stdout)
         );
 
         println!("cargo::rerun-if-changed=resources");