fix: use std::env::join_paths for AXVISOR_VM_CONFIGS

Author: Iscreamx

xtask/src/tbuld.rs

@@ -78,12 +78,10 @@ impl Context {
         }
 
         if !vm_config_paths.is_empty() {
-            let sep = if cfg!(target_os = "windows") { ";" } else { ":" };
-            let value = vm_config_paths
-                .iter()
-                .map(|p| format!("{}", p.display()))
-                .collect::<Vec<_>>()
-                .join(&sep);
+            let value = std::env::join_paths(&vm_config_paths)
+                .map_err(|e| anyhow::anyhow!("Failed to join VM config paths: {}", e))?
+                .to_string_lossy()
+                .into_owned();
             cargo.env.insert("AXVISOR_VM_CONFIGS".to_string(), value);
         }