Hello All, <div class="gmail_quote"> I forked the github Racket repo, and created a new branch in order to update Frtime from the scheme or mzscheme #langs to Racket. This has been progressing well, until I ran into a small issue that I think likely affects most individuals working on Racket source for which collections exist in the collection paths. <pre><div>(module animation frtime ... </div></pre> -Despite making changes to the frtime language, excising the scheme and mzscheme languages within the source that was checked out, it became apparent that this declaration and others referring to collections were relying on the imports defined from the mzscheme lang. After running Check Syntax, right-clicking on the lang declaration, and opening the files all the way down to a file where changes had been made (say lang-utils.rkt), the unedited source was visible. This source showing (sans my edits) was that found within the C:/Program Files/Racket/collects/frtime directory, rather than my github racket source directory. How does one go about unregistering a collection such that all references to that collection subsequently look not into the collections directory, but compile and run the files from within your checked out source? I guess this question could likely could be generalized to, "How do Racket developers make edits to source files backing collections and run them without references to collections referring to the pre-compiled collections, or those in the Racket installation?". I am interested in how to resolve this problem, and I apologize that I don't yet know the language well enough to formulate the problem in the correct terms. Can anyone provide some guidance here? For anyone interested in the branch itself, find it at: <a href="https://github.com/paddymahoney/racket/commits/frtime-update" target="_blank">https://github.com/paddymahoney/racket/commits/frtime-update</a> Thank you all! -Patrick </div>