Hi, guy fleury iteriteka skribis: > * gnu/packages/image-viewers.scm(chaffa): New variable. I’d suggest the changes below. Additionally, this code detects SSE4.1 and related instruction set extensions at configuration time. As a result, I think the resulting code may not run on all x86_64 machines. Could you investigate this and see how we can get a generic binary? Thanks, Ludo’.