白い熊, 白い熊 写道: > However seeing it how should I change the unpack now - to > extract only > via tar, however from the tar.gz file which isn't a gz really? Guix does invoke only ‘tar’, but it's tar that chokes on the misleading file extension and throws the error you see. The easiest way to convince tar of its errant ways is to set the correct extension in the store: (source (origin (method url-fetch) (uri "https://…/mell-1.0.0.tar.gz") ;; Despite the above extension, this is actually an uncompressed tar file. (file-name (string-append name "-" version "tar")) (sha256 …))) Kind regards, T G-R