diff --git a/src/UniGetUI.PackageEngine.Managers.Bun/Bun.cs b/src/UniGetUI.PackageEngine.Managers.Bun/Bun.cs
index bbc885a602..7daedb1b23 100644
--- a/src/UniGetUI.PackageEngine.Managers.Bun/Bun.cs
+++ b/src/UniGetUI.PackageEngine.Managers.Bun/Bun.cs
@@ -207,7 +207,24 @@ public override IReadOnlyList<string> FindCandidateExecutableFiles()
         }
 
         internal static string GetGlobalPackagesDirectory(string userProfile)
-            => Path.Combine(userProfile, ".bun", "install", "global");
+            => GetGlobalPackagesDirectory(userProfile, Environment.GetEnvironmentVariable);
+
+        // Mirrors Bun's own lookup order: BUN_INSTALL_GLOBAL_DIR, then $BUN_INSTALL/install/global,
+        // then ~/.bun/install/global.
+        internal static string GetGlobalPackagesDirectory(
+            string userProfile,
+            Func<string, string?> getEnvironmentVariable)
+        {
+            string? globalDir = getEnvironmentVariable("BUN_INSTALL_GLOBAL_DIR");
+            if (!string.IsNullOrEmpty(globalDir))
+                return globalDir;
+
+            string? bunInstall = getEnvironmentVariable("BUN_INSTALL");
+            if (!string.IsNullOrEmpty(bunInstall))
+                return Path.Combine(bunInstall, "install", "global");
+
+            return Path.Combine(userProfile, ".bun", "install", "global");
+        }
 
         internal static bool HasGlobalPackageManifest(string globalDir)
             => Directory.Exists(globalDir) && File.Exists(Path.Combine(globalDir, "package.json"));
diff --git a/src/UniGetUI.PackageEngine.Tests/BunManagerTests.cs b/src/UniGetUI.PackageEngine.Tests/BunManagerTests.cs
index 913b231cef..5592c5a2ce 100644
--- a/src/UniGetUI.PackageEngine.Tests/BunManagerTests.cs
+++ b/src/UniGetUI.PackageEngine.Tests/BunManagerTests.cs
@@ -757,6 +757,42 @@ public void GetAvailableUpdatesReturnsEmptyWhenGlobalManifestIsMissing()
         }
     }
 
+    /// <summary>
+    /// Tests the global packages directory follows Bun's lookup order for its environment variables.
+    /// </summary>
+    [Fact]
+    public void GetGlobalPackagesDirectoryHonorsBunEnvironmentVariables()
+    {
+        string userProfile = Path.Combine("home", "user");
+        string globalDir = Path.Combine("custom", "global");
+        string bunInstall = Path.Combine("scoop", "persist", "bun");
+
+        Assert.Equal(
+            globalDir,
+            Bun.GetGlobalPackagesDirectory(
+                userProfile,
+                name => name switch
+                {
+                    "BUN_INSTALL_GLOBAL_DIR" => globalDir,
+                    "BUN_INSTALL" => bunInstall,
+                    _ => null,
+                }));
+
+        Assert.Equal(
+            Path.Combine(bunInstall, "install", "global"),
+            Bun.GetGlobalPackagesDirectory(
+                userProfile,
+                name => name == "BUN_INSTALL" ? bunInstall : null));
+
+        Assert.Equal(
+            Path.Combine(userProfile, ".bun", "install", "global"),
+            Bun.GetGlobalPackagesDirectory(userProfile, _ => null));
+
+        Assert.Equal(
+            Path.Combine(userProfile, ".bun", "install", "global"),
+            Bun.GetGlobalPackagesDirectory(userProfile, _ => ""));
+    }
+
     /// <summary>
     /// Tests Bun install location defaults to the global Bun node_modules directory.
     /// </summary>