Hi Veera, in order to make this actually work in a Guix release, please refer to the new file in gnu/local.mk in GNU_SYSTEM_MODULES . Or better yet, in this case I would prefer if you just added qiv to the existing file gnu/packages/image-viewers.scm . >+ #:tests? #f Why? Please add a comment. It seems that the changelog mentions that the tests are now in "make install". Did the tests work? >+ #:make-flags >+ (list >+ "CC=gcc" >+ "LCMS=" >+ (string-append "PREFIX=" (assoc-ref %outputs "out"))))) Indentation is off. Otherwise it looks good. Could you send a v2 of your patch with these points addressed?