On Sun, May 07, 2017 at 07:24:59PM +0200, Hartmut Goebel wrote: > * gnu/packages/image.scm (pngcrunch): New variable. Thanks, LGTM overall! > + (("\\$\\(DESTDIR\\)/usr/") > + (string-append (assoc-ref outputs "out") "/")))))))) That's strange; DESTDIR is typically an intermediate location between the source directory and PREFIX. I assume this Makefile is written by hand?