diff --git a/lib/compiler/Maker.zig b/lib/compiler/Maker.zig
index 0da5d000a41f9952954acf834f110afb161c9482..ee3c189a28173d70378a15c05f513df057375583 100644
--- a/lib/compiler/Maker.zig
+++ b/lib/compiler/Maker.zig
@@ -1250,11 +1250,9 @@ fn configure(graph: *Graph, options: ConfigureOptions) !ScannedConfig {
             }) });
         }
 
-        const rand_int = randInt(io, u64);
-        const tmp_dir_sub_path = "tmp" ++ Dir.path.sep_str ++ std.fmt.hex(rand_int);
         const config_tmp_path: Path = .{
             .root_dir = graph.local_cache_root,
-            .sub_path = try arena.dupe(u8, tmp_dir_sub_path),
+            .sub_path = try arena.print("tmp" ++ Dir.path.sep_str ++ "{x}", .{randInt(io, u64)}),
         };
         const config_tmp_file: Io.File = try config_tmp_path.root_dir.handle.createFile(
             io,