sh-4.4$ set -x
sh-4.4$ 
sh-4.4$ nix-store -r /nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3; echo $?
+ nix-store -r /nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3
these paths will be fetched (134.19 MiB download, 1863.96 MiB unpacked):
  /nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3
  /nix/store/jvkljrfxk8svpak297a0raqyrm10xq3h-ghc-8.8.3-doc
copying path '/nix/store/jvkljrfxk8svpak297a0raqyrm10xq3h-ghc-8.8.3-doc' from 'https://cache.nixos.org'...
copying path '/nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3' from 'https://cache.nixos.org'...
warning: you did not specify '--add-root'; the result might be removed by the garbage collector
/nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3
+ echo 0
0
sh-4.4$ 
sh-4.4$ nix-store --verify-path  /nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3; echo $?
+ nix-store --verify-path /nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3
+ echo 0
0
sh-4.4$ 
sh-4.4$ nix hash-path /nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3; echo $?
+ nix hash-path /nix/store/dhnspmn5hc312lm46a98w4n1bz27bp40-ghc-8.8.3
sha256-X1cmrtxXmar4P1L+Om7edBeo3I8lEx9dyX2Ti4Z6LQY=
+ echo 0
0
sh-4.4$ # Germany