Hi Ludo, You reported this bug more than 4 years ago about Guitarix 0.33 and now it is gone and replaced by Guitarix 0.38.
>From my test with Guix d258d9c7d222e6b64531c14293f41bd8d62ea4f7, "guix challenge guitarix" and "guix build --rounds=3" do not report issues about reproducibility. And from my knowledge, the waf-based packages are not affected. Do you agree to close this bug since it is not relevant anymore? Thanks in advance for any comments. All the best, simon