Guix,

I think they should.

All of our package names are lower case, and it doesn't add value 
that

  $ guix package -A ExifTool

matches zero, zip, zilch, nada, nothing, while

  $ guix package -A exiftool
  perl-image-exiftool	11.11	out 
  gnu/packages/photo.scm:208:2

does.

Kind regards,

T G-R