Hi Lars,

Thank you for the patches.

I've got some simplification review comments.

--8<---------------cut here---------------start------------->8---
+    (native-inputs (list python-setuptools python-wheel python-pytest))
--8<---------------cut here---------------end--------------->8---
Please sort alphabetically.

--8<---------------cut here---------------start------------->8---
+     (list
+      #:phases #~(modify-phases %standard-phases
+                   (replace 'check
+                     (lambda* (#:key tests? #:allow-other-keys)
+                       (when tests?
+                         (invoke "pytest" "-v")))))))
--8<---------------cut here---------------end--------------->8---
This may be removed as pyproject-build-system tries to detect available
test runner e.g. pytest in your case and does all setup within build
system flow.

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+    (arguments
+     (list
+      #:phases #~(modify-phases %standard-phases
+                   (replace 'check
+                     (lambda* (#:key tests? #:allow-other-keys)
+                       (when tests?
+                         ;; tests requiring network disabled
+                         (invoke "pytest" "-v" "--ignore=tests/test_data.py")))))))
--8<---------------cut here---------------end--------------->8---
Likewise, you may utiize #:test-flags instead of adding custom phase.

--8<---------------cut here---------------start------------->8---
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/drufat/triangle")
+             (commit (string-append "v" version))
+             (recursive? #t)))
--8<---------------cut here---------------end--------------->8---
I guess the project contains git submodules, may you double check if may
replace them with our own?

gmsh is save to be refreshed on master:

--8<---------------cut here---------------start------------->8---
guix refresh --list-dependent gmsh
Building the following 3 packages
would ensure 4 dependent packages are rebuilt: python-pygmsh@7.1.17
openfoam-com@2212 openfoam-org@10.20230119
--8<---------------cut here---------------end--------------->8---

Waiting for v2!

--
Oleg