[hge@nova:~] $ guix install emacs-next --dry-run
guix install: warning: Consider running 'guix pull' followed by
'guix package -u' to get up-to-date packages and security updates.

The following package would be installed:
   emacs-next	27.0.50-0.36abf68	/gnu/store/j5h242anx1qyrjz8bd1w51jrc2wrjr1g-emacs-next-27.0.50-0.36abf68

substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
The following derivation would be built:
   /gnu/store/sh1z23axyb38v2yxif606l3li4i7rs79-profile.drv
17.1 MB would be downloaded:
   /gnu/store/2413jk028xf7rx1b3alska572jpf4in1-gtk+-3.24.12-bin
   /gnu/store/2413jk028xf7rx1b3alska572jpf4in1-gtk+-3.24.12-bin
   /gnu/store/9xa5bdkf8bdyfins5j71i9sbsynk2ixn-gtk+-3.24.12
The following profile hooks would be built:
   /gnu/store/0g63i0r8niwab2xl6n0cr3rvnn22gzq4-xdg-mime-database.drv
   /gnu/store/0nvxr7h18232ahyywncjh0xb6m1kzcs9-ca-certificate-bundle.drv
   /gnu/store/2yjhlb74an5vd54hwa97fb1ynqynqly5-xdg-desktop-database.drv
   /gnu/store/5b7gnkxl9c13h50q206dyl3jgpf82yyb-glib-schemas.drv
   /gnu/store/bgbhpmb1v6gnwf0chzp5hnrjzfdy8pvs-gtk-im-modules.drv
   /gnu/store/bns4c65kbyv6dd64pcxfyg16i3smn2ay-manual-database.drv
   /gnu/store/dhxiiyycg20jw4hhr87ixiyv4g206qyx-fonts-dir.drv
   /gnu/store/wvn7g4xadd2gbijh41mmw54c84zbg7az-gtk-icon-themes.drv
   /gnu/store/zz0vjxsgnp1cbdaysbyhjzbnrg3zb58x-info-dir.drv