diff --git a/crates/vite_global_cli/src/commands/global/install.rs b/crates/vite_global_cli/src/commands/global/install.rs
index c37f71d2b2..c998dd5ab2 100644
--- a/crates/vite_global_cli/src/commands/global/install.rs
+++ b/crates/vite_global_cli/src/commands/global/install.rs
@@ -3,8 +3,8 @@
 use std::{
     collections::{HashMap, HashSet},
     io::{IsTerminal, Read, Write},
-    process::Stdio,
-    time::Duration,
+    process::{self, Stdio},
+    time::{Duration, SystemTime, UNIX_EPOCH},
 };
 
 use futures::{StreamExt, stream::FuturesUnordered};
@@ -338,12 +338,7 @@ pub async fn install(
 
         // 4.5 Commit the install by discarding the backup and reporting the installed bins.
         if let Some(backup) = backup {
-            if let Err(error) = backup.discard().await {
-                if first_error.is_none() {
-                    first_error = Some(package_error(&package_name, error));
-                }
-                continue;
-            }
+            backup.discard().await;
         }
 
         // 4.6 Print success message
@@ -461,8 +456,7 @@ impl PackageBackup {
             return Ok(None);
         }
 
-        let backup_dir = get_tmp_dir()?.join("packages").join(package_name);
-        remove_dir_all_if_exists(&backup_dir).await?;
+        let backup_dir = unique_backup_dir(package_name)?;
         if let Some(parent) = backup_dir.parent() {
             tokio::fs::create_dir_all(parent).await?;
         }
@@ -487,11 +481,31 @@ impl PackageBackup {
         Ok(())
     }
 
-    async fn discard(self) -> Result<(), Error> {
-        remove_dir_all_if_exists(&self.backup_dir).await
+    async fn discard(self) {
+        if let Err(error) = remove_dir_all_if_exists(&self.backup_dir).await {
+            tracing::warn!(
+                "Failed to remove old global package backup at {}: {}",
+                self.backup_dir.as_path().display(),
+                error
+            );
+        }
     }
 }
 
+fn unique_backup_dir(package_name: &str) -> Result<AbsolutePathBuf, Error> {
+    let base = get_tmp_dir()?.join("packages").join(package_name);
+    let package_dir_name =
+        base.as_path().file_name().and_then(|name| name.to_str()).unwrap_or("package");
+    let timestamp = SystemTime::now().duration_since(UNIX_EPOCH).unwrap_or_default().as_nanos();
+    let backup_name = format!("{package_dir_name}.{}.{}.old", process::id(), timestamp);
+
+    let mut backup_path = base.as_path().to_path_buf();
+    backup_path.set_file_name(backup_name);
+
+    AbsolutePathBuf::new(backup_path)
+        .ok_or_else(|| Error::ConfigError("Invalid global package backup path".into()))
+}
+
 async fn cleanup_failed_install(
     package_name: &str,
     backup: Option<PackageBackup>,
@@ -1022,6 +1036,48 @@ mod tests {
         }
     }
 
+    #[tokio::test]
+    async fn test_package_backup_uses_unique_tmp_dir_for_scoped_package() {
+        use tempfile::TempDir;
+        use vite_path::AbsolutePathBuf;
+
+        let temp_dir = TempDir::new().unwrap();
+        let temp_path = temp_dir.path().to_path_buf();
+        let _env_guard = vite_shared::EnvConfig::test_guard(
+            vite_shared::EnvConfig::for_test_with_home(&temp_path),
+        );
+
+        let package_dir =
+            AbsolutePathBuf::new(temp_path.join("packages").join("@scope").join("pkg")).unwrap();
+        tokio::fs::create_dir_all(&package_dir).await.unwrap();
+        tokio::fs::write(package_dir.join("marker").as_path(), "current").await.unwrap();
+
+        let stale_backup =
+            AbsolutePathBuf::new(temp_path.join("tmp").join("packages").join("@scope").join("pkg"))
+                .unwrap();
+        tokio::fs::create_dir_all(&stale_backup).await.unwrap();
+        tokio::fs::write(stale_backup.join("stale").as_path(), "locked").await.unwrap();
+
+        let backup = PackageBackup::create("@scope/pkg", &package_dir)
+            .await
+            .unwrap()
+            .expect("existing package should be backed up");
+
+        assert_ne!(backup.backup_dir.as_path(), stale_backup.as_path());
+        assert!(
+            stale_backup.join("stale").as_path().exists(),
+            "stale fixed backup should be left untouched"
+        );
+        assert!(
+            backup.backup_dir.join("marker").as_path().exists(),
+            "current package should be moved into the unique backup"
+        );
+        assert!(
+            !package_dir.as_path().exists(),
+            "original package directory should be moved out before reinstall"
+        );
+    }
+
     #[test]
     fn test_is_local_package_spec_relative_paths() {
         assert!(is_local_package_spec("."));
diff --git a/packages/cli/snap-tests-global/env-install-stale-backup/.node-version b/packages/cli/snap-tests-global/env-install-stale-backup/.node-version
new file mode 100644
index 0000000000..85e502778f
--- /dev/null
+++ b/packages/cli/snap-tests-global/env-install-stale-backup/.node-version
@@ -0,0 +1 @@
+22.22.0
diff --git a/packages/cli/snap-tests-global/env-install-stale-backup/env-install-stale-backup-pkg/cli.js b/packages/cli/snap-tests-global/env-install-stale-backup/env-install-stale-backup-pkg/cli.js
new file mode 100644
index 0000000000..e801213849
--- /dev/null
+++ b/packages/cli/snap-tests-global/env-install-stale-backup/env-install-stale-backup-pkg/cli.js
@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+console.log('env-install-stale-backup-cli');
diff --git a/packages/cli/snap-tests-global/env-install-stale-backup/env-install-stale-backup-pkg/package.json b/packages/cli/snap-tests-global/env-install-stale-backup/env-install-stale-backup-pkg/package.json
new file mode 100644
index 0000000000..766eb36c7c
--- /dev/null
+++ b/packages/cli/snap-tests-global/env-install-stale-backup/env-install-stale-backup-pkg/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "@scope/env-install-stale-backup-pkg",
+  "version": "1.0.0",
+  "bin": {
+    "env-install-stale-backup-cli": "./cli.js"
+  }
+}
diff --git a/packages/cli/snap-tests-global/env-install-stale-backup/snap.txt b/packages/cli/snap-tests-global/env-install-stale-backup/snap.txt
new file mode 100644
index 0000000000..d017b22867
--- /dev/null
+++ b/packages/cli/snap-tests-global/env-install-stale-backup/snap.txt
@@ -0,0 +1,26 @@
+> vp install -g ./env-install-stale-backup-pkg # Install scoped package globally
+info: Installing 1 global package with Node.js <semver>
+✓ Installed @scope/env-install-stale-backup-pkg <semver>
+  Bins: env-install-stale-backup-cli
+
+> node -e "const fs = require('fs'); const path = require('path'); const cp = require('child_process'); const dir = path.join(process.env.VP_HOME, 'tmp/packages/@scope/env-install-stale-backup-pkg'); fs.mkdirSync(dir, { recursive: true }); const exe = path.join(dir, 'locked-node.exe'); fs.copyFileSync(process.execPath, exe); fs.writeFileSync(path.join(dir, 'stale.txt'), 'stale'); const child = cp.spawn(exe, ['-e', 'setTimeout(() => {}, 60000)'], { detached: true, stdio: 'ignore' }); child.unref(); fs.writeFileSync(path.join(dir, 'pid.txt'), String(child.pid));" # Seed stale locked fixed backup path
+> vp install -g ./env-install-stale-backup-pkg # Reinstall should ignore stale backup
+info: Installing 1 global package with Node.js <semver>
+✓ Installed @scope/env-install-stale-backup-pkg <semver>
+  Bins: env-install-stale-backup-cli
+
+> node -e "const fs = require('fs'); const path = require('path'); console.log(fs.readFileSync(path.join(process.env.VP_HOME, 'tmp/packages/@scope/env-install-stale-backup-pkg/stale.txt'), 'utf8'));" # Stale backup should be untouched
+stale
+
+> node -e "const fs = require('fs'); const path = require('path'); console.log(fs.readFileSync(path.join(process.env.VP_HOME, 'bins/env-install-stale-backup-cli.json'), 'utf8'));" # Bin config should still point to package
+{
+  "name": "env-install-stale-backup-cli",
+  "package": "@scope/env-install-stale-backup-pkg",
+  "version": "1.0.0",
+  "nodeVersion": "22.22.0",
+  "source": "vp"
+}
+
+> node -e "const fs = require('fs'); const path = require('path'); const pidPath = path.join(process.env.VP_HOME, 'tmp/packages/@scope/env-install-stale-backup-pkg/pid.txt'); try { process.kill(Number(fs.readFileSync(pidPath, 'utf8')), 'SIGTERM'); } catch {}" # Stop stale backup lock process
+> vp remove -g @scope/env-install-stale-backup-pkg # Cleanup
+Uninstalled @scope/env-install-stale-backup-pkg
diff --git a/packages/cli/snap-tests-global/env-install-stale-backup/steps.json b/packages/cli/snap-tests-global/env-install-stale-backup/steps.json
new file mode 100644
index 0000000000..d947e688d8
--- /dev/null
+++ b/packages/cli/snap-tests-global/env-install-stale-backup/steps.json
@@ -0,0 +1,13 @@
+{
+  "env": {},
+  "ignoredPlatforms": ["linux", "darwin"],
+  "commands": [
+    "vp install -g ./env-install-stale-backup-pkg # Install scoped package globally",
+    "node -e \"const fs = require('fs'); const path = require('path'); const cp = require('child_process'); const dir = path.join(process.env.VP_HOME, 'tmp/packages/@scope/env-install-stale-backup-pkg'); fs.mkdirSync(dir, { recursive: true }); const exe = path.join(dir, 'locked-node.exe'); fs.copyFileSync(process.execPath, exe); fs.writeFileSync(path.join(dir, 'stale.txt'), 'stale'); const child = cp.spawn(exe, ['-e', 'setTimeout(() => {}, 60000)'], { detached: true, stdio: 'ignore' }); child.unref(); fs.writeFileSync(path.join(dir, 'pid.txt'), String(child.pid));\" # Seed stale locked fixed backup path",
+    "vp install -g ./env-install-stale-backup-pkg # Reinstall should ignore stale backup",
+    "node -e \"const fs = require('fs'); const path = require('path'); console.log(fs.readFileSync(path.join(process.env.VP_HOME, 'tmp/packages/@scope/env-install-stale-backup-pkg/stale.txt'), 'utf8'));\" # Stale backup should be untouched",
+    "node -e \"const fs = require('fs'); const path = require('path'); console.log(fs.readFileSync(path.join(process.env.VP_HOME, 'bins/env-install-stale-backup-cli.json'), 'utf8'));\" # Bin config should still point to package",
+    "node -e \"const fs = require('fs'); const path = require('path'); const pidPath = path.join(process.env.VP_HOME, 'tmp/packages/@scope/env-install-stale-backup-pkg/pid.txt'); try { process.kill(Number(fs.readFileSync(pidPath, 'utf8')), 'SIGTERM'); } catch {}\" # Stop stale backup lock process",
+    "vp remove -g @scope/env-install-stale-backup-pkg # Cleanup"
+  ]
+}