Please describe the problem.

We observer error in our CI:

      addurl on file:///private/tmp/nix-build-git-annex-10.20231129.drv-0/git-annex-10.20231129-src/.t/25/tmprepo0/myurl failed with unexpected exit code (transcript follows)
      addurl file:///private/tmp/nix-build-git-annex-10.20231129.drv-0/git-annex-10.20231129-src/.t/25/tmprepo0/myurl 
      git-annex: security: createProcess: posix_spawnp: does not exist (No such file or directory)
      addurl: 1 failed

What steps will reproduce the problem?

build git-annex and run tests on darwin

What version of git-annex are you using? On what operating system?