this derivation will be built:
  /nix/store/krgwg0iw8rz8y7dcwp38qr1z46lblb6b-mcptoon-0.7.19.drv
error: Cannot build '/nix/store/krgwg0iw8rz8y7dcwp38qr1z46lblb6b-mcptoon-0.7.19.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/0pp724mxy0yxrhys4h7fw5c0r00w4qjj-mcptoon-0.7.19
         /nix/store/4sm9bfkv40gwdszk1fdhw6pdzic8vn2q-mcptoon-0.7.19-dist
       Last 25 log lines:
       >                     builtins, exception_name.decode('ascii'),
       >                     SubprocessError)
       >             if issubclass(child_exception_type, OSError) and hex_errno:
       >                 errno_num = int(hex_errno, 16)
       >                 if err_msg == "noexec:chdir":
       >                     err_msg = ""
       >                     # The error must be from chdir(cwd).
       >                     err_filename = cwd
       >                 elif err_msg == "noexec":
       >                     err_msg = ""
       >                     err_filename = None
       >                 else:
       >                     err_filename = orig_executable
       >                 if errno_num != 0:
       >                     err_msg = os.strerror(errno_num)
       >                 if err_filename is not None:
       > >                   raise child_exception_type(errno_num, err_msg, err_filename)
       > E                   FileNotFoundError: [Errno 2] No such file or directory: 'git'
       >
       > /nix/store/d64q19q1xjdwfhqx6czvrjgrhq0n3lcc-python3-3.14.7/lib/python3.14/subprocess.py:1990: FileNotFoundError
       > =========================== short test summary info ============================
       > FAILED tests/test_skills.py::TombstoneTests::test_removal_uses_the_shared_graveyard_when_given_one - FileNotFoundError: [Errno 2] No such file or directory: 'git'
       > FAILED tests/test_skills.py::TombstoneTests::test_removal_without_a_repo_still_archives - FileNotFoundError: [Errno 2] No such file or directory: 'git'
       > FAILED tests/test_skills.py::TombstoneTests::test_tombstone_commits_only_the_removed_path - FileNotFoundError: [Errno 2] No such file or directory: 'git'
       > ============= 3 failed, 1055 passed, 1 skipped in 67.15s (0:01:07) =============
       For full logs, run:
         nix log /nix/store/krgwg0iw8rz8y7dcwp38qr1z46lblb6b-mcptoon-0.7.19.drv