No more `Path` in `libnixcmd` #117

Job	Run time
vm_tests	17m 55s
Check Cachix and Docker secrets present for installer tests	1s
tests (ubuntu-latest)	22m 30s
tests (macos-latest)	43m 40s
flake_regressions	0s
docker_push_image	0s
installer	0s
installer_test	0s
	1h 24m 6s

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