fixed build script

build.rs

@@ -1,6 +1,5 @@
 use std::ffi::OsStr;
 use std::fs::File;
-use std::io::prelude::*;
 use std::io::Write;
 use std::path::Path;
 use std::process::Command;
@@ -10,7 +9,7 @@ fn main() -> std::io::Result<()> {
     //shaders path
     let shaders = Path::new("./src/shaders");
     //shader target path
-    let out = Command::new("mkdir").arg("target/shaders/").output();
+    Command::new("mkdir").arg("target/shaders/").status()?;
 
     let shader_target = Path::new("./target/shaders/");
     //compile all glsl shaders
@@ -28,7 +27,7 @@ fn main() -> std::io::Result<()> {
                 .arg(shader_path)
                 .arg("-o")
                 .arg(shader_file)
-                .status();
+                .status()?;
         }
     }
     //include all compiled shaders in shaders.rs file in src dir