Refactor and add checking for conditions

Author: mrexodia

src/build.cpp

@@ -4,10 +4,10 @@
 #include "project_parser.hpp"
 
 #include "fs.hpp"
-#include <sstream>
 #include <cstddef>
-#include <stdexcept>
 #include <cstdlib>
+#include <sstream>
+#include <stdexcept>
 #include <system_error>
 
 namespace cmkr {