Weird builder args behaviour

[roby2014]

When compiling with this:

    builder_kwargs = builder_argdict(args)
    builder_kwargs["compile_software"] = False
    if builder_kwargs["csr_svd"] is None:
        builder_kwargs["csr_svd"] = f"../litex-pac/5a-75e_{args.revision}.svd"
    if builder_kwargs["memory_x"] is None:
        builder_kwargs["memory_x"] = "../litex-pac/memory.x"

    builder = Builder(soc, **builder_kwargs)
    builder.build(run=args.build)

I get a bitstream of

-rw-r--r-- 1 roby roby 218570 Apr 20 19:24 /home/roby/repos/colorlight-litex-rs/hw/build/colorlight_5a_75e/gateware/colorlight_5a_75e.bit

and flashing doesnt seem to be working (led does not blink when flash)

however, when using it like this:

builder = Builder(soc, **builder_argdict(args))
builder.build(run=args.build)

I get:

-rw-r--r-- 1 roby roby 658863 Apr 20 18:34 /home/roby/repos/risc-v-colorlight-5a-75e/build/colorlight_5a_75e/gateware/colorlight_5a_75e.bit

and flashing works (led blinks)

Am I stupid? Shouldnt this be the same?