guix.scm: use guix shell instead
guix.scm: use guix shell instead

vcflib/vcflib,vcflib/vcflib,vcflib/vcflib,ekg/vcflib,vcflib/vcflib,vcflib/vcflib,ekg/vcflib,ekg/vcflib,ekg/vcflib,vcflib/vcflib,vcflib/vcflib,vcflib/vcflib,ekg/vcflib