Pointed out to me today by a coworker:

[connorbaker@nixos-desktop:~]$ nix eval nixpkgs#path --apply '(path: path)'
/nix/store/xnjw9gmfmpppdj6bxpw6cfkspc3h6xwl-source

[connorbaker@nixos-desktop:~]$ nix eval nixpkgs#path --apply '(path: "${path}")'
"/nix/store/6hqgw3kmvcv4glqqs64idkwvp7zx0c11-xnjw9gmfmpppdj6bxpw6cfkspc3h6xwl-source"

:(

(yes, it copies the entirety of nixpkgs from one path in the store to another path in the store)

Pointed out to me today by a coworker:

[connorbaker@nixos-desktop:~]$ nix eval nixpkgs#path --apply '(path: path)'
/nix/store/xnjw9gmfmpppdj6bxpw6cfkspc3h6xwl-source

[connorbaker@nixos-desktop:~]$ nix eval nixpkgs#path --apply '(path: "${path}")'
"/nix/store/6hqgw3kmvcv4glqqs64idkwvp7zx0c11-xnjw9gmfmpppdj6bxpw6cfkspc3h6xwl-source"

:(

(yes, it copies the entirety of nixpkgs from one path in the store to another path in the store)

Pointed out to me today by a coworker:

[connorbaker@nixos-desktop:~]$ nix eval nixpkgs#path --apply '(path: path)'
/nix/store/xnjw9gmfmpppdj6bxpw6cfkspc3h6xwl-source

[connorbaker@nixos-desktop:~]$ nix eval nixpkgs#path --apply '(path: "${path}")'
"/nix/store/6hqgw3kmvcv4glqqs64idkwvp7zx0c11-xnjw9gmfmpppdj6bxpw6cfkspc3h6xwl-source"

>:(

(yes, it copies the entirety of nixpkgs from one path in the store to another path in the store)

A string interpolates to itself.

A path in an interpolated expression is first copied into the Nix store, and the resulting string is the [store path] of the newly created store object .

https://github.com/NixOS/nix/blob/723fdeb4f1bd7fad7c3b00603067d23c314b25c5/doc/manual/source/language/string-interpolation.md?plain=1#L153-L155