I aborted, since I realised that guix package -s doesn't include the source url and hash, which would be important for a testsuite...
Some interesting measurements: guix package --list-available | grep -o --regex "^[a-zA-Z0-9-]*" | wc -l 3797 cat guix-metadata.txt | grep --regex "^name: .*$" | wc -l 13949 looks like we have many package variants? and an example of what guix package -s guix exports guix package -s guix name: guix version: 0.10.0 outputs: out systems: x86_64-linux i686-linux armhf-linux mips64el-linux dependencies: bzip2-1.0.6 emacs-magit-popup-2.7.0 emacs-minimal-24.5 geiser-0.8.1 + gnutls-3.5.2 guile-2.0.11 guile-json-0.5.0 gzip-1.8 libgcrypt-1.7.0 pkg-config-0.29 + sqlite-3.12.2 zlib-1.2.8 location: gnu/packages/package-management.scm:71:2 homepage: http://www.gnu.org/software/guix license: GPL 3+ synopsis: Functional package manager for installed software packages and versions description: GNU Guix is a functional package manager for the GNU system, and is also + a distribution thereof. It includes a virtual machine image. Besides the usual + package management features, it also supports transactional upgrades and roll-backs, + per-user profiles, and much more. It is based on the Nix package manager. name: guix version: 0.10.0-1.97c8 outputs: out systems: x86_64-linux i686-linux armhf-linux mips64el-linux dependencies: autoconf-wrapper-2.69 automake-1.15 bzip2-1.0.6 emacs-magit-popup-2.7.0 + emacs-minimal-24.5 geiser-0.8.1 gettext-0.19.8 gnutls-3.5.2 graphviz-2.38.0 + guile-2.0.11 guile-json-0.5.0 gzip-1.8 help2man-1.47.4 libgcrypt-1.7.0 + pkg-config-0.29 sqlite-3.12.2 texinfo-6.1 zlib-1.2.8 location: gnu/packages/package-management.scm:216:4 homepage: http://www.gnu.org/software/guix license: GPL 3+ synopsis: Functional package manager for installed software packages and versions description: GNU Guix is a functional package manager for the GNU system, and is also + a distribution thereof. It includes a virtual machine image. Besides the usual + package management features, it also supports transactional upgrades and roll-backs, + per-user profiles, and much more. It is based on the Nix package manager.