diff --git a/lib/std/os.zig b/lib/std/os.zig
index ffc294f0e6..22cdf30351 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -2414,6 +2414,9 @@ pub fn unlinkatW(dirfd: fd_t, sub_path_w: []const u16, flags: u32) UnlinkatError
 pub const RenameError = error{
     /// In WASI, this error may occur when the file descriptor does
     /// not hold the required rights to rename a resource by path relative to it.
+    ///
+    /// On Windows, this error may be returned instead of PathAlreadyExists when
+    /// renaming a directory over an existing directory.
     AccessDenied,
     FileBusy,
     DiskQuota,
diff --git a/src/Package.zig b/src/Package.zig
index 26be399c18..23a0549aa7 100644
--- a/src/Package.zig
+++ b/src/Package.zig
@@ -570,7 +570,7 @@ fn renameTmpIntoCache(
                 };
                 continue;
             },
-            error.PathAlreadyExists => {
+            error.PathAlreadyExists, error.AccessDenied => {
                 // Package has been already downloaded and may already be in use on the system.
                 cache_dir.deleteTree(tmp_dir_sub_path) catch |del_err| {
                     std.log.warn("unable to delete temp directory: {s}", .{@errorName(del_err)});