diff --git a/build.zig b/build.zig
index 7a6d504..d204e56 100644
--- a/build.zig
+++ b/build.zig
@@ -168,6 +168,7 @@ pub fn jetzigInit(b: *std.Build, exe: *std.Build.Step.Compile, options: JetzigIn
     exe_routes_file.root_module.addImport("zmpl", zmpl_module);
 
     const run_routes_file_cmd = b.addRunArtifact(exe_routes_file);
+    run_routes_file_cmd.has_side_effects = true; // FIXME
     const routes_file_path = run_routes_file_cmd.addOutputFileArg("routes.zig");
     run_routes_file_cmd.addArgs(&.{
         root_path,