Fantastic, thank you so much for this great feature! I can't build your patch though: --8<---------------cut here---------------start------------->8--- [ 30%] LOAD guix/scripts/package.scm ;;; note: source file ./guix/scripts/package.scm ;;; newer than compiled /home/ambrevar/projects/guix/guix/scripts/package.go ;;; note: source file ./guix/scripts/package.scm ;;; newer than compiled /home/ambrevar/projects/guix/guix/scripts/package.go ;;; note: source file ./gnu/packages.scm ;;; newer than compiled /home/ambrevar/projects/guix/gnu/packages.go ;;; note: source file ./gnu/packages.scm ;;; newer than compiled /home/ambrevar/projects/guix/gnu/packages.go error: failed to load 'gnu/packages.scm': ice-9/eval.scm:293:34: no code for module (xapian xapian) --8<---------------cut here---------------end--------------->8--- Beside this issue, how do you test it? I guess we first need to install a bunch of package with `pre-inst-env guix ...` then to a `pre-inst-env search`? -- Pierre Neidhardt https://ambrevar.xyz/