Steps to reproduce the issue

Set up a spack environment to use the clingo concretizer by adding

config:
concretizer: clingo

to the spack.yaml file. Then run:

$ spack concretize
...

Information on your system

• Spack: 0.16.2-3738-b4c6c11e68
• Python: 3.6.13
• Platform: cray-sles15-zen2
• Concretizer: clingo

Additional information

I encountered this issue on the Spock EA system so out of an abundance of caution I'm excising the full error output in case there's something NDA-adjacent in there. Let me know what more information might be useful. Selected error output without full paths:

cmake-3.20.5-buohxldhbe7xzsyhnt76m5tanfjbmnty/share/cmake-3.20/Modules/FindPackageHandleStandardArgs.
cmake:230 (message):
9 Could NOT find Python (missing: Python_LIBRARIES Interpreter Development
10 Development.Module Development.Embed)

@alalazo

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