I wanted to use an environment file that contains a package definition, and use it with inferiors. Here is the full guix.scm: --8<---------------cut here---------------start------------->8--- (use-modules (guix channels) (guix inferior) (guix build-system gnu) (guix packages) (guix licenses) (gnu packages) (ice-9 match)) (define channels (list (channel (name 'guix-bimsb) (url "https://github.com/BIMSBbioinfo/guix-bimsb.git") (commit "be42b099867a29a68a9ffbf304dc7f9137b75fe3")) (channel (name 'guix) (url "https://git.savannah.gnu.org/git/guix.git") (commit "01e33a031e493477d930b9383d397fea012a3b1a") (introduction (make-channel-introduction "9edb3f66fd807b096b48283debdcddccfea34bad" (openpgp-fingerprint "BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA")))))) (define (lookup name) (specification->package name)) (define (lookup-inferior name) (define inferior (inferior-for-channels channels)) (match (lookup-inferior-packages inferior name) ((first . rest) first) (_ (error (format #false "Could not find package `~a'.~%" name))))) (define (p name) (let* ((how (if (getenv "USE_GUIX_INFERIOR") lookup-inferior lookup)) (pkg (how name))) `(,name ,pkg))) (define %version (symbol->string (with-input-from-file "VERSION" read))) (define-public my-package (package (name "my-package") (version %version) (source (string-append (getcwd) "/my-package-" version ".tar.gz")) (build-system gnu-build-system) (inputs (map p (list "bwa" "r-minimal" "r-rmarkdown" "python-wrapper" "python-pyyaml"))) (native-inputs (map p (list "autoconf" "automake"))) (home-page "TODO") (synopsis "TODO") (description "TODO") (license gpl3+))) my-package --8<---------------cut here---------------end--------------->8--- The idea was that you would use the provided channels with USE_GUIX_INFERIOR=t guix environment -l guix.scm Unfortunately, this does not work, but there also is no error. I end up in an environment where none of the declared inputs are available. That’s because (guix scripts environments) has no facilities to deal with packages that are of type . -- Ricardo