New review comment by jcgruenhage on void-packages repository

https://github.com/void-linux/void-packages/pull/36276#discussion_r894667824

Comment:
I'm a bit lost here, with

```suggestion
checkdepends="${depends} python3-pytest"
```
I now get this:

```text
=> python3-gnupg-0.4.9_1: running do_check ...
/void-packages/common/build-style/python3-pep517.sh: line 21: NO_EXTERNAL_TESTS=1: command not found
=> ERROR: python3-gnupg-0.4.9_1: do_check: '${make_check_pre} python3 -m pytest ${testjobs} ${make_check_args} ${make_check_target}' exited with 127
=> ERROR:   in do_check() at common/build-style/python3-pep517.sh:21
```