Hello,
I am trying to use an inferior as a package input and expecting to see
it when I use `guix build -D` or `guix shell -D`. When I use a regular
package it is included in the profile; when I use an inferior it is
silently excluded from the profile (no errors). Why isn't this working?
The currently active channel is very recent (`guix describe` is below),
and for this example I am attempting to use the immediate parent commit
for the inferior (to help eliminate other possible causes for the problem).
Testing with `guix build` (there is no output when using the inferior):
```console
$ guix build -D -f package.scm | grep hello
/gnu/store/ab584kfyc7pymc1cmdrkwzz3lwv86yf6-hello-2.12.3
```
Testing with `guix shell` (there is no output when using the inferior):
```console
$ guix shell -D -f package.scm -- \
sh -c 'find -L $GUIX_ENVIRONMENT -name hello'
/gnu/store/5d24k2zfvcrdslpnfwywrw5kfw81vk7n-profile/bin/hello
```
Here is the `package.scm`:
```scm
(define-module (test-package)
#:use-module (gnu packages base)
#:use-module (guix build-system copy)
#:use-module (guix channels)
#:use-module (guix gexp)
#:use-module (guix inferior)
#:use-module ((guix licenses) #:prefix license:)
#:use-module (guix packages)
#:use-module (srfi srfi-1))
;; The next three defines are almost identical to the example at
;; <https://guix.gnu.org/manual/devel/en/html_node/Inferiors.html>.
(define channels
(list (channel
(name 'guix)
(url "https://git.guix.gnu.org/guix.git";)
(commit "129cf96915591b381ccd0a4c9b8813da2491eced")
(introduction
(make-channel-introduction
"c91e27c60864faa229198f6f0caf620275c429a2"
(openpgp-fingerprint
"3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5"))))))
(define inferior
(inferior-for-channels channels))
(define inferior-hello
(first (lookup-inferior-packages inferior "hello")))
(define-public test
(package
(name "test")
(version "")
(source (plain-file "test" "test"))
(build-system copy-build-system)
(inputs
(list
;; With this regular package, hello is included.
;;hello
;; With this inferior, hello is not included.
inferior-hello))
(synopsis "Test synopsis")
(description "Test description.")
(home-page "https://test.example.com";)
(license license:gpl3)))
test
```
```console
$ guix describe --format=channels-sans-intro
(list (channel
(name 'guix)
(url "https://git.guix.gnu.org/guix.git";)
(branch "master")
(commit "c63b598686296493dbe6979727d51aabc5f85bf8")))
```
Thanks,
Owen
