Thinking more about it, since this a new module, there shouldn't be any recursive dependency problem.Probably you are missing some #:use-module at the top of your new module. I'd start minimal and see what works, and evaluate the package at the REPL for more accurate messages perhaps.
I could boil it down a bit: when commenting out `#:use-module (gnu packages commencement)` in gnu/packages/engineering.scm the error vanishes but the freehdl package in module engineering does not build anymore (due to gcc-toolchain missing).
Is there a cycle inside module commencement? Seems really strange to me? -- Reza Housseini This message is signed with my GnuPG key: C0F3 0812 9AF2 80F4 0830 C2C1 C375 C6AF 0512 5C52
OpenPGP_0xC375C6AF05125C52.asc
Description: OpenPGP public key
OpenPGP_signature
Description: OpenPGP digital signature