Installation issue: channelflow missing depends_on("c") in package.py

[mkszuba]

Steps to reproduce the issue

$ spack install channelflow

Error message

Error message

[spack cc] Error: SPACK_CC_* variables not set: this usually means a missing depends_on("c", type="build") in package.py

Information on your system

• Spack: 1.1.1
• Builtin repo: 119680a
• Python: 3.10.12
• Platform: linux-ubuntu22.04-zen4

Additional information

I have confirmed that with the missing depends_on line added to the package, channelflow builds and installs successfully.

spack-build-out.txt
spack-build-env.txt

General information

• I have run spack debug report and reported the version of Spack/Python/Platform
• I have run spack maintainers <name-of-the-package> and @mentioned any maintainers
• I have uploaded the build log and environment files
• I have searched the issues of this repo and believe this is not a duplicate