as I have problems I believe since I installed nix1.12, I 've tried a "nix-build --check -A nixUnstable" but the output is "warning: rewriting hashes in ‘/nix/store/k3l1v543zrid790j3nb0kic54azyj3in-nix-1.12pre5511_c94f3d55-debug’; cross fingers
warning: rewriting hashes in ‘/nix/store/04b7g7bk2vps58ch5bkcn4lzks7jll4s-nix-1.12pre5511_c94f3d55-dev’; cross fingers
warning: rewriting hashes in ‘/nix/store/990cgkd030vxigzjhs42qqm72si3kwic-nix-1.12pre5511_c94f3d55-doc’; cross fingers
warning: rewriting hashes in ‘/nix/store/z82nl4irycbc66xnp3fc76y5s6nfydf5-nix-1.12pre5511_c94f3d55-man’; cross fingers
warning: rewriting hashes in ‘/nix/store/2y77iy91rmmibfxzqiyrsgc7mxkx8y47-nix-1.12pre5511_c94f3d55’; cross fingers
error: derivation ‘/nix/store/givs7fdb2h4j502mqc798ixsc5chp0vg-nix-1.12pre5511_c94f3d55.drv’ may not be deterministic: output ‘/nix/store/2y77iy91rmmibfxzqiyrsgc7mxkx8y47-nix-1.12pre5511_c94f3d55’ differs
" which scares me a bit. Should I ?