Hi Feng, thanks for the patch.
Here, the downloaded filename is "v0.4.775.tar.gz", which doesn't contain "you-get" anymore (we prefer it does so the base directory doesn't fill with opaque names, and this is checked by 'guix lint'). We usually fix this by adding- (version "0.4.715") + (version "0.4.775") (source (origin (method url-fetch) (uri (string-append - "https://github.com/soimort/you-get/releases/download/v" - version "/you-get-" version ".tar.gz")) + "https://github.com/soimort/you-get/archive/v" + version ".tar.gz"))